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160-639: On 11 March 2011, at 14:46 JST (05:46 UTC ), a M w  9.0–9.1 undersea megathrust earthquake occurred in the Pacific Ocean, 72 km (45 mi) east of the Oshika Peninsula of the Tōhoku region . It lasted approximately six minutes and caused a tsunami . It is sometimes known in Japan as the " Great East Japan Earthquake " ( 東日本大震災 , Higashi nihon daishinsai ) , among other names. The disaster

320-504: A 7.7 M w quake at 15:26 all occurred on 11 March. A month later, a major aftershock struck offshore on 7 April with a magnitude of 7.1 M w . Its epicenter was underwater, 66 km (41 mi) off the coast of Sendai. The Japan Meteorological Agency assigned a magnitude of 7.4 M JMA , while the United States Geological Survey lowered it to 7.1 M w . At least four people were killed, and electricity

480-452: A certain magnitude (magnitude 8 on the JMA scale); that is, in the case of very large earthquakes, the scales' values change little despite large differences in the earthquakes' energy. This resulted in an underestimation of the tsunami's height in initial reports. Problems in issuing updates also contributed to delays in evacuations. The warning system was supposed to be updated about 15 minutes after

640-534: A goal of increasing roadside trees in Tokyo to 1 million (from 480,000), and adding 1,000 ha (2,500 acres) of green space, 88 ha (220 acres) of which will be a new park named "Umi no Mori" (Sea Forest) which will be on a reclaimed island in Tokyo Bay which used to be a landfill. From 2007 to 2010, 436 ha (1,080 acres) of the planned 1,000 ha of green space was created and 220,000 trees were planted, bringing

800-698: A leading global financial hub has diminished with the Lost Decades since the 1990s—when the Tokyo Stock Exchange (TSE) was the world's largest, with a market capitalization about 1.5 times that of the NYSE —the city is still a large financial hub, and the TSE remains among the world's top five major stock exchanges . Tokyo is categorized as an Alpha+ city by the Globalization and World Cities Research Network . The city

960-432: A lesser extent Chiba and Ibaraki . Tokyo has been hit by powerful megathrust earthquakes in 1703, 1782, 1812, 1855, 1923, and much more indirectly (with some liquefaction in landfill zones) in 2011 ; the frequency of direct and large quakes is a relative rarity. The 1923 earthquake , with an estimated magnitude of 7.9, killed more than 100,000 people, the last time the urban area was directly hit. Mount Fuji

1120-468: A local government. The Tokyo Metropolitan Government administers the whole metropolis including the 23 special wards and the cities and towns that constitute the prefecture. It is headed by a publicly elected governor and metropolitan assembly. Its headquarters is in Shinjuku Ward. The governor of Tokyo is elected every four years. The incumbent governor, Yuriko Koike , was elected in 2016, following

1280-508: A magnitude of at least 8.4 M w , which also created a large tsunami that inundated the Sendai plain. Three tsunami deposits have been identified within the Holocene sequence of the plain, all formed within the last 3,000 years, suggesting an 800 to 1,100 year recurrence interval for large tsunamigenic earthquakes. In 2001 it was reckoned that there was a high likelihood of a large tsunami hitting

1440-462: A major shopping and entertainment center. Various plans have been proposed for transferring national government functions from Tokyo to secondary capitals in other regions of Japan, to slow down rapid development in Tokyo and revitalize economically lagging areas of the country. These plans have been controversial within Japan and have yet to be realized. On September 7, 2013, the IOC selected Tokyo to host

1600-546: A new Western Standard Time ( 西部標準時 , Seibu Hyōjunji ) at 120° longitude as the time zone for the Japanese Miyako and Yaeyama Islands , as well as Taiwan and its Penghu Islands . While Korea came under Japanese rule in 1910, Korea Standard Time of GMT+08:30 continued to be used until 1912, when it was changed to Central Standard Time. Western Standard Time, which was used in Taiwan and some parts of Okinawa ,

1760-521: A result of the quake. The report also stated that the quake had caused several major landslides on the seabed in the affected area. The Earth's axis shifted by estimates of between 10 and 25 cm (4 and 10 in). This deviation led to a number of small planetary changes, including the length of a day , the tilt of the Earth , and the Chandler wobble . The speed of the Earth's rotation increased, shortening

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1920-497: A significant effort to introduce daylight saving time, but was ultimately unsuccessful. However, it is not clear that DST would conserve energy in Japan. A 2007 simulation estimated that introducing DST to Japan would increase energy use in Osaka residences by 0.13%, with a 0.02% saving due to lighting more than outweighed by a 0.15% increase due to cooling costs; the simulation did not examine non-residential buildings. On May 22, 2013,

2080-474: A small tsunami was recorded after a 7.1 M w aftershock. As of 16 March 2012 aftershocks continued, totaling 1887 events over magnitude 4.0; a regularly updated map showing all shocks of magnitude 4.5 and above near or off the east coast of Honshu in the last seven days showed over 20 events. As of 11 March 2016 there had been 869 aftershocks of 5.0 M w or greater, 118 of 6.0 M w or greater, and 9 over 7.0 M w as reported by

2240-464: A timely warning, the initial earthquake and tsunami warning that was issued for the event was based on a calculation that requires only about three minutes. This calculation is, in turn, based on the maximum amplitude of the seismic wave. The amplitude of the seismic wave is measured using the JMA magnitude scale , which is similar to Richter scale . However, these scales "saturate" for earthquakes that are above

2400-427: A total area of approximately 561 square kilometers (217 sq mi) in Japan. The earthquake took place at 14:46 JST (UTC 05:46) around 67 kilometers (42 mi) from the nearest point on Japan's coastline, and initial estimates indicated the tsunami would have taken 10 to 30 minutes to reach the areas first affected, and then areas farther north and south based on the geography of the coastline. At 15:55 JST,

2560-401: A tsunami warning, data from GPS tidal meters as well as from undersea water pressure meters, and there are plans to install more of these meters and to develop further technology to utilize data observed by them. To prevent under-reporting of tsunami heights, early quantitative observation data that are smaller than the expected amplitude will be overridden and the public will instead be told that

2720-494: A tsunami was observed flooding Sendai Airport , which is located near the coast of Miyagi Prefecture , with waves sweeping away cars and planes and flooding various buildings as they traveled inland. The impact of the tsunami in and around Sendai Airport was filmed by an NHK News helicopter, showing a number of vehicles on local roads trying to escape the approaching wave and being engulfed by it. A 4-meter-high (13 ft) tsunami hit Iwate Prefecture . Wakabayashi Ward in Sendai

2880-490: A wetter summer and a drier winter. The growing season in Tokyo lasts for about 322 days from around mid-February to early January. Snowfall is sporadic, and occurs almost annually. Tokyo often sees typhoons every year, though few are strong. The wettest month since records began in 1876 was October 2004, with 780 millimeters (30 in) of rain, including 270.5 mm (10.65 in) on the ninth of that month. The most recent of four months on record to observe no precipitation

3040-486: A width of 200 km (120 mi). Analysis showed that this earthquake consisted of a set of three events. Other major earthquakes with tsunamis struck the Sanriku Coast region in 1896 and in 1933 . The source area of this earthquake has a relatively high coupling coefficient surrounded by areas of relatively low coupling coefficients in the west, north, and south. From the averaged coupling coefficient of 0.5–0.8 in

3200-520: A world city is said to have depreciated greatly during these three decades. Nonetheless, Tokyo still saw new urban developments during this period. Recent projects include Ebisu Garden Place, Tennōzu Isle , Shiodome , Roppongi Hills , Shinagawa , and the Marunouchi side of Tokyo Station . Land reclamation projects in Tokyo have also been going on for centuries. The most prominent is the Odaiba area, now

3360-677: Is Shofukuji in Higashi-Murayama . The current building was constructed in 1407, during the Muromachi period (1336–1573). Although greatly reduced in number by later fires, earthquakes, and air raids, a considerable number of Edo-era buildings survive to this day. The Tokyo Imperial Palace , which was occupied by the Tokugawa Shogunate as Edo Castle during the Edo Period (1603–1868), has many gates and towers dating from that era, although

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3520-596: Is 19:01, from 26 June to 1 July, despite being at 35°41'N latitude). Since 2000, a few local governments and commerce departments have promoted unmandated hour-earlier work schedule experiments during the summer without officially resetting clocks. The Council on Economic and Fiscal Policy of the Cabinet Office is expected to propose that the Japanese government begin studying DST in an attempt to help combat global warming . Japanese former Prime Minister Shinzō Abe made

3680-527: Is 40 m (131 ft). Chiba Prefecture borders it to the east, Yamanashi to the west, Kanagawa to the south, and Saitama to the north. Mainland Tokyo is further subdivided into the special wards (occupying the eastern half) and the Tama area ( 多摩地域 ) stretching westwards. Tokyo has a latitude of 35.65 (near the 36th parallel north ), which makes it more southern than Rome (41.90), Madrid (40.41), New York City (40.71) and Beijing (39.91). Within

3840-473: Is December 1995. Annual precipitation has ranged from 879.5 mm (34.63 in) in 1984 to 2,229.6 mm (87.78 in) in 1938. See or edit raw graph data . Tokyo's climate has warmed significantly since temperature records began in 1876. The western mountainous area of mainland Tokyo, Okutama also lies in the humid subtropical climate (Köppen classification: Cfa ). The climates of Tokyo's offshore territories vary significantly from those of

4000-693: Is a reference to the original settlement's location at the meeting of the Sumida River and Tokyo Bay . During the Meiji Restoration in 1868, the name of the city was changed to Tokyo ( 東京 , from 東 tō "east", and 京 kyō "capital") , when it became the new imperial capital, in line with the East Asian tradition of including the word capital ( 京 ) in the name of the capital city (for example, Kyoto ( 京都 ), Keijō ( 京城 ), Beijing ( 北京 ), Nanjing ( 南京 ), and Xijing ( 西京 )). During

4160-512: Is about 100 km (62 mi) southwest of Tokyo. There is a low risk of eruption. The last recorded was the Hōei eruption which started on December 16, 1707, and ended about January 1, 1708 (16 days). During the Hōei eruption, the ash amount was 4 cm in southern Tokyo (bay area) and 2 cm to 0.5 cm in central Tokyo. Kanagawa had 16 cm to 8 cm ash and Saitama 0.5 to 0 cm. If

4320-505: Is also recognized as one of the world's most livable ones; it was ranked fourth in the world in the 2021 edition of the Global Livability Ranking . Tokyo has also been ranked as the safest city in the world in multiple international surveys. Tokyo was originally known as Edo ( 江戸 ) , a kanji compound of 江 ( e , "cove, inlet") and 戸 ( to , "entrance, gate, door"). The name, which can be translated as " estuary ",

4480-574: Is an international research and development hub and an academic center with several major universities , including the University of Tokyo , the top-ranking university in the country. Tokyo Station is the central hub for the Shinkansen , Japan's high-speed railway network, and Shinjuku Station in Tokyo is the world's busiest train station. The city is home to the world's tallest tower, Tokyo Skytree . The Tokyo Metro Ginza Line , which opened in 1927,

4640-525: Is believed that the early warning by the Japan Meteorological Agency (JMA) saved many lives. The warning for the general public was delivered about eight seconds after the first P wave was detected, or about 31 seconds after the earthquake occurred. However, the estimated intensities were smaller than the actual ones in some places, especially in Kanto, Koshinetsu , and Northern Tōhoku regions where

4800-517: Is deemed the record in Japan historically, as of reporting date, that exceeds 38.2 meters (125 ft) from the 1896 Sanriku earthquake . It was also estimated that the tsunami reached heights of up to 40.5 meters (133 ft) in Miyako in Tōhoku's Iwate Prefecture. The inundated areas closely matched those of the 869 Sanriku tsunami . Inundation heights were observed along 2,000 kilometers (1,200 mi) of

4960-515: Is in the tropical savanna climate zone (Köppen classification: Aw ). Tokyo's Izu and Ogasawara islands are affected by an average of 5.4 typhoons a year, compared to 3.1 in mainland Kantō. Tokyo is near the boundary of three plates , making it an extremely active region for smaller quakes and slippage which frequently affect the urban area with swaying as if in a boat, although epicenters within mainland Tokyo (excluding Tokyo's 2,000 km (1,243 mi)–long island jurisdiction) are quite rare. It

2011 Tōhoku earthquake and tsunami - Misplaced Pages Continue

5120-465: Is located on the Kantō Plain with five river systems and dozens of rivers that expand during each season. Important rivers are Edogawa , Nakagawa , Arakawa , Kandagawa , Megurogawa and Tamagawa . In 1947, Typhoon Kathleen struck Tokyo, destroying 31,000 homes and killing 1,100 people. In 1958, Typhoon Ida dropped 400 mm (16 in) of rain in a single week, causing streets to flood. In

5280-458: Is not uncommon in the metro area to have hundreds of these minor quakes (magnitudes 4–6) that can be felt in a single year, something local residents merely brush off but can be a source of anxiety not only for foreign visitors but for Japanese from elsewhere as well. They rarely cause much damage (sometimes a few injuries) as they are either too small or far away as quakes tend to dance around the region. Particularly active are offshore regions and to

5440-534: Is often referred to by its numerical date, 3.11 (read san ten ichi-ichi in Japanese). It was the most powerful earthquake ever recorded in Japan , and the fourth most powerful earthquake recorded in the world since modern seismography began in 1900. The earthquake triggered powerful tsunami waves that may have reached heights of up to 40.5 meters (133 ft) in Miyako in Tōhoku's Iwate Prefecture , and which, in

5600-567: Is part of the Kantō region on the central coast of Honshu , Japan's largest island. Tokyo serves as Japan's economic center and the seat of both the Japanese government and the Emperor of Japan . The Tokyo Metropolitan Government administers Tokyo's central 23 special wards (which formerly made up Tokyo City ), various commuter towns and suburbs in its western area , and two outlying island chains known as

5760-409: Is particularly in favour of this movement because daylight starts as early as 03:30 (in standard time) there in summer due to its high latitude and its location near the eastern edge of the time zone, with much of the region's solar time actually closer to UTC+10:00. Because of this, the sun sets shortly after 19:00 in much of the eastern part of the country (in Tokyo, the latest sunset of the entire year

5920-654: Is the oldest underground metro line in Asia–Pacific . Tokyo's nominal gross domestic output was 113.7 trillion yen or US$ 1.04 trillion in FY2021 and accounted for 20.7% of the country's total economic output, which converts to 8.07 million yen or US$ 73,820 per capita. Including the Greater Tokyo Area, Tokyo is the second-largest metropolitan economy in the world after New York , with a 2022 gross metropolitan product estimated at US$ 2.08 trillion. Although Tokyo's status as

6080-527: Is the third-smallest, above only Osaka and Kagawa . Its administrative structure is similar to that of Japan's other prefectures . The 23 special wards ( 特別区 , tokubetsu-ku ) , which until 1943 constituted the city of Tokyo , are self-governing municipalities , each having a mayor, a council, and the status of a city. In addition to these 23 special wards, Tokyo also includes 26 more cities ( 市 -shi ), five towns ( 町 -chō or machi ), and eight villages ( 村 -son or -mura ), each of which has

6240-467: The 1973 oil crisis put an end to the rapid post-war recovery and development of Japan's economy, its position as the world's second-largest economy at the time had seemed secure by that point, remaining so until 2010 when it was surpassed by China . Tokyo's development was sustained by its status as the economic, political, and cultural hub of such a country. In 1978, after years of the intense Sanrizuka Struggle , Narita International Airport opened as

6400-601: The 2020 Summer Olympics . Thus, Tokyo became the first Asian city to host the Olympic Games twice. However, the 2020 Olympic Games were postponed and held from July 23 to August 8, 2021, as a result of the COVID-19 pandemic . Under Japanese law , the prefecture of Tokyo is designated as a to ( 都 ) , translated as metropolis . Tokyo Prefecture is the most populous prefecture and the densest, with 6,100 inhabitants per square kilometer (16,000/sq mi); by geographic area it

6560-583: The Allied occupation of Japan . In 1952, three weeks before the occupation ended, the Japanese government, which had been granted increased powers, abolished daylight saving time, and the Allied occupation authorities did not interfere. Since then, DST has never been officially implemented nationwide in Japan. Starting in the late 1990s, a movement to reinstate DST in Japan gained some popularity, aiming at saving energy and increasing recreational time. The Hokkaido region

2011 Tōhoku earthquake and tsunami - Misplaced Pages Continue

6720-567: The Arakawa River are most at risk of flooding. Tokyo's buildings are too diverse to be characterized by any specific archtectural style, but it can be generally said that a majority of extant structures were built in the past a hundred years; twice in recent history has the metropolis been left in ruins: first in the 1923 Great Kantō earthquake and later after extensive firebombing in World War II . The oldest known extant building in Tokyo

6880-585: The Governor of Tokyo (then) Naoki Inose proposed a two-hour advance ( UTC+11 ) Japan Standard Time at an industry competitiveness conference. Its purpose is to enhance the influence of the Japanese financial market by starting early in the Tokyo financial market . The Japanese government has decided to consider this proposal. However, there has been no specific discussion of this proposal for more than ten years. （明治十九年七月十三日勅令第五十一号） Tokyo Tokyo , officially

7040-611: The Kasumigaseki district in Chiyoda, and the name Kasumigaseki is often used as a metonym for the Japanese national civil service . Tokyo has 25 constituencies for the House of Representatives , 18 of which were won by the ruling Liberal Democrats and 7 by the main opposition Constitutional Democrats in the 2021 general election . Apart from these seats, through the Tokyo proportional representation block , Tokyo sends 17 more politicians to

7200-474: The Meiji era (1868–1912), each local region had its own time zone in which noon was when the sun was exactly at its culmination . As modern transportation methods, such as trains, were adopted, this practice became a source of confusion. For example, there is a difference of about 5 degrees longitude between Tokyo and Osaka and because of this, a train that departed from Tokyo would arrive at Osaka 20 minutes behind

7360-473: The Meiji Period . Some gardens were immune from such fates and are today open to the public; Hamarikyu ( Kofu Tokugawa family ), Shibarikyu ( Kishu Tokugawa family ), Koishikawa Korakuen ( Mito Tokugawa family ), Rikugien ( Yanagisawa family ), and Higo Hosokawa Garden ( Hosokawa family ). The Akamon , which is now widely seen as a symbol of the University of Tokyo , was originally built to commemorate

7520-451: The Meiji Restoration . The high survival rate of concrete buildings promoted the transition from timber and brick architecture to modern, earthquake-proof construction. The Tokyo Metro Ginza Line portion between Ueno and Asakusa , the first underground railway line built outside Europe and the American continents, was completed on December 30, 1927. Although Tokyo recovered robustly from

7680-508: The Ministry of Finance were also relocated to Tokyo by 1871, and the first railway line in the country was opened on 14 October 1872, connecting Shimbashi ( Shiodome ) and Yokohama ( Sakuragicho ), which is now part of the Tokaido line . The 1870s saw the establishment of other institutions and facilities that now symbolize Tokyo, such as Ueno Park (1873), the University of Tokyo (1877) and

7840-498: The Ministry of Justice building (1895), the International Library of Children's Literature (1906) and Mistubishi building one (1894, rebuilt in 2010) are some of the few brick survivors from this period. It was regarded as fashionable by some members of the Japanese aristocracy to build their Tokyo residences in grand and modern styles, and some of these buildings still exist, although most are in private hands and open to

8000-552: The Ogasawara Islands , which had been under control of the US since the war ended, were returned in 1968. Ryokichi Minobe , a Marxian economist who served as the governor for 12 years starting in 1967, is remembered for his welfare state policy, including free healthcare for the elderly and financial support for households with children, and his ‘war against pollution’ policy, as well as the large government deficit they caused. Although

8160-505: The Oshika Peninsula of Tōhoku , Japan, lasting approximately six minutes. The earthquake was initially reported as 7.9 M w by the USGS before it was quickly upgraded to 8.8 M w , then to 8.9 M w , and then finally to 9.0 M w . On 11 July 2016, the USGS further upgraded the earthquake to 9.1. Sendai was the nearest major city to the earthquake, 130 km (81 mi) from

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8320-461: The Sendai area, traveled at 700 km/h (435 mph) and up to 10 km (6 mi) inland. Residents of Sendai had only eight to ten minutes of warning, and more than a hundred evacuation sites were washed away. The snowfall which accompanied the tsunami and the freezing temperature hindered rescue works greatly; for instance, Ishinomaki , the city with the most deaths, was 0 °C (32 °F) as

8480-705: The Shuto Expressway to meet the increased demand brought about by the 1964 Tokyo Olympics , the first Olympic Games held in Asia. Around this time, the 31-metre height restriction, imposed on all buildings since 1920, was relaxed due to the increased demand for office buildings and advancements in earthquake-proof construction. Starting with the Kasumigaseki Building (147 metres) in 1968, skyscrapers began to dominate Tokyo's skyline. During this period of rapid rebuilding, Tokyo celebrated its 500th anniversary in 1956 and

8640-598: The Tokyo Islands . Despite most of the world recognizing Tokyo as a city, since 1943 its governing structure has been more akin to a prefecture, with an accompanying Governor and Assembly taking precedence over the smaller municipal governments which make up the metropolis. Notable special wards in Tokyo include Chiyoda , the site of the National Diet Building and the Tokyo Imperial Palace ; Shinjuku ,

8800-497: The Tokyo Metropolis (東京都, Tōkyō-to ). This reorganization aimed to create a more centralized and efficient administrative structure to better manage resources, urban planning, and civil defence during wartime. The Tokyo Metropolitan Government thus became responsible for both prefectural and city functions while administering cities, towns, and villages in the suburban and rural areas. Although Japan enjoyed significant success in

8960-423: The Tokyo Metropolis , is the capital city of Japan . With a population of over 14 million residents within the city proper as of 2023, it is one of the most populous cities in the world . The Greater Tokyo Area , which includes Tokyo and parts of six neighboring prefectures , is the most-populous metropolitan area in the world, with 41 million residents as of 2024 . Located at the head of Tokyo Bay , Tokyo

9120-792: The Tokyo Metropolitan Government Building (1991). Kisho Kurokawa was also active in the city, and his works there include the National Art Center (2005) and the Nakagin Capsule Tower (1972). Other notable contemporary buildings in Tokyo include the Tokyo Dome , Mode Gakuen Cocoon Tower , Roppongi Hills , Tokyo International Forum , and Asahi Beer Hall . As of October 2012, the official intercensal estimate showed 13.506 million people in Tokyo, with 9.214 million living within Tokyo's 23 wards. During

9280-424: The Tokyo Stock Exchange (1878). The rapid modernization of the country was driven from Tokyo, with its business districts such as Marunouchi filled with modern brick buildings and the railway network serving as a means to help the large influx of labour force needed to keep the development of the economy. The City of Tokyo was officially established on May 1, 1889. The Imperial Diet , the national legislature of

9440-495: The costliest natural disaster in history . According to a 2020 study, "the earthquake and its aftermaths resulted in a 0.47 percentage point decline in Japan's real GDP growth in the year following the disaster." The magnitude 9.1 ( M w ) undersea megathrust earthquake occurred on 11 March 2011 at 14:46 JST (05:46 UTC) in the north-western Pacific Ocean at a relatively shallow depth of 32 km (20 mi), with its epicenter approximately 72 km (45 mi) east of

9600-572: The second-largest in the world at the time behind that of the United States . As of 2023 , the city is home to 29 of the world's 500 largest companies, as listed in the annual Fortune Global 500 ; the second-highest number of any city. In the 20th and 21st centuries, Tokyo became the first city in Asia to host the Summer Olympics and Paralympics in 1964, and again in 2021, and it also hosted three G7 summits in 1979, 1986, and 1993. Tokyo

9760-551: The 1930s but canceled due to the war. However, due to the monetary contraction policy known as the Dodge Line , named after Joseph Dodge , the neoliberal economic advisor to MacArthur, the plan had to be reduced to a minimal one focusing on transport and other infrastructure. In 1947, the 35 pre-war special wards were reorganized into the current 23 wards . Tokyo did not experience fast economic growth until around 1950, when heavy industry output returned to pre-war levels. Since around

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9920-527: The 1950s and 1960s, the government invested 6–7% of the national budget on disaster and risk reduction. A huge system of dams, levees and tunnels was constructed. The purpose is to manage heavy rain, typhonic rain, and river floods. Tokyo has currently the world's largest underground floodwater diversion facility called the Metropolitan Area Outer Underground Discharge Channel (MAOUDC). It took 13 years to build and

10080-480: The 2004 Indian Ocean quake. Japan's National Research Institute for Earth Science and Disaster Prevention (NIED) calculated a peak ground acceleration of 2.99  g (29.33 m/s). The largest individual recording in Japan was 2.7  g , in Miyagi Prefecture, 75 km from the epicenter; the highest reading in the Tokyo metropolitan area was 0.16  g . The strong ground motion registered at

10240-654: The 26th Centenary of the Enthronement of Emperor Jimmu celebrations took place on a grand scale to boost morale and increase the sense of national identity in the same year. On 8 December 1941, Japan attacked the American bases at Pearl Harbor in Hawaii , entering the Second World War against the Allied Powers . The wartime regime greatly affected life in the city. In 1943, Tokyo City merged with Tokyo Prefecture to form

10400-482: The Earthquake Early Warning system and the actual intensities occurred in the aftershocks and triggered earthquakes. Such discrepancies in the warning were attributed by the JMA to the system's inability to distinguish between two different earthquakes that happened at around same time, as well as to the reduced number of reporting seismometers due to power outages and connection failures. The system's software

10560-448: The House of Representatives, 6 of whom were members of the ruling LDP in the 2021 election. The Tokyo at-large district , which covers the entire metropolis, sends 12 members to the House of Councillors . The mainland portion of Tokyo lies northwest of Tokyo Bay and measures about 90 km (56 mi) east to west and 25 km (16 mi) north to south. The average elevation in Tokyo

10720-399: The JMA bulletin also included the caveat that "At some parts of the coasts, tsunamis may be higher than those observed at the observation sites." The timing of the earliest recorded tsunami maximum readings ranged from 15:12 to 15:21, between 26 and 35 minutes after the earthquake had struck. The bulletin also included initial tsunami observation details, as well as more detailed maps for

10880-427: The JMA magnitude scale to saturate, no quantitative prediction will be released in the initial warning; instead, there will be words that describe the situation's emergency. There are plans to install new teleseismometers with the ability to measure larger earthquakes, which would allow the calculation of a quake's moment magnitude scale in a timely manner. JMA also implemented a simpler empirical method to integrate, into

11040-556: The Japanese Meteorological Agency. The number of aftershocks was associated with decreased health across Japan. On 13 February 2021, a magnitude 7.1–7.3 earthquake struck off the coast of Sendai. It caused some damage in Miyagi and Fukushima prefectures. One person was killed, and 185 were injured. The Geospatial Information Authority of Japan reported land subsidence based on the height of triangulation stations in

11200-476: The Japanese coast guard said that the quake shifted the seabed near the epicenter 24 meters (79 ft) and elevated the seabed off the coast of Miyagi Prefecture by 3 meters (9.8 ft). A report by the Japan Agency for Marine-Earth Science and Technology , published in Science on 2 December 2011, concluded that the seabed in the area between the epicenter and the Japan Trench moved 50 meters (160 ft) east-southeast and rose about 7 meters (23 ft) as

11360-426: The Meiji government, Edo was renamed Tokyo (Eastern Capital) on 3 September 1868. Emperor Meiji visited the city once at the end of that year and eventually moved there in 1869. Tokyo had already been the nation's political center for nearly three centuries, and the emperor's residence made it a de facto imperial capital as well, with the former Edo Castle becoming the Imperial Palace . Government ministries such as

11520-628: The Mitsui Headquarters (1929), Mitsukoshi Nihonbashi flagship store (1914, refurbished in 1925), Takashimaya Nihonbashi flagship store (1932), Wako in Ginza (1932) and Isetan Shinjuku flagship store (1933). This spread of earthquake and fire-resistant architecture reached council housing too, most notably the Dōjunkai apartments . The 1930s saw the rise of styles that combined characteristics of both traditional Japanese and modern designs. Chuta Ito

11680-449: The Pacific Ocean region reaching the entire Pacific coast of North and South America from Alaska to Chile . Warnings were issued and evacuations were carried out in many countries bordering the Pacific. Although the tsunami affected many of these places, the heights of the waves were minor. Chile's Pacific coast, one of the farthest from Japan at about 17,000 kilometers (11,000 mi) away,

11840-538: The Sendai plain as more than 1,100 years had then elapsed. In 2007, the probability of an earthquake with a magnitude of M w 8.1–8.3 was estimated as 99% within the following 30 years. This earthquake occurred where the Pacific plate is subducting under the plate beneath northern Honshu. The Pacific plate, which moves at a rate of 8 to 9 cm (3.1 to 3.5 in) per year, dips under Honshu's underlying plate, building large amounts of elastic energy . This motion pushes

12000-483: The US dollar, had a devastating effect on Japan's manufacturing sector, particularly affecting small to mid-size companies based in Tokyo. This led the government to adopt a domestic-demand-focused economic policy, ultimately causing an asset price bubble . Land redevelopment projects were planned across the city, and real estate prices skyrocketed. By 1990, the estimated value of the Imperial Palace surpassed that of

12160-513: The US seized control of the Mariana Islands . From these islands, newly developed long-range B-29 bombers could conduct return journeys. The bombing of Tokyo in 1944 and 1945 is estimated to have killed between 75,000 and 200,000 civilians and left more than half of the city destroyed. The deadliest night of the war came on March 9–10, 1945, the night of the American " Operation Meetinghouse " raid. Nearly 700,000 incendiary bombs were dropped on

12320-399: The accumulated energy. In the area near the trench, the coupling coefficient is high, which could act as the source of the large tsunami. Most of the foreshocks are interplate earthquakes with thrust-type focal mechanisms. Both interplate and intraplate earthquakes appeared in the aftershocks offshore Sanriku coast with considerable proportions. The surface energy of the seismic waves from

12480-508: The administrative boundaries of Tokyo Metropolis are two island chains in the Pacific Ocean directly south: the Izu Islands , and the Ogasawara Islands , which stretch more than 1,000 km (620 mi) away from the mainland. Because of these islands and the mountainous regions to the west, Tokyo's overall population density figures far under-represent the real figures for the urban and suburban regions of Tokyo. The former city of Tokyo and

12640-508: The area measured by GPS as compared to their previous values from 14 April 2011. Scientists say that the subsidence is permanent. As a result, the communities in question are now more susceptible to flooding during high tides. One minute before the earthquake was felt in Tokyo, the Earthquake Early Warning system, which includes more than 1,000 seismometers in Japan, sent out warnings of impending strong shaking to millions. It

12800-462: The area of the Honshu rupture is not very straight, it is unusual for the magnitude of its earthquake to exceed 8.5 M w. The hypocentral region of this earthquake extended from offshore Iwate Prefecture to offshore Ibaraki Prefecture . The Japanese Meteorological Agency said that the earthquake may have ruptured the fault zone from Iwate to Ibaraki with a length of 500 km (310 mi) and

12960-474: The area that had been Tokyo City until 1943, 30 other municipalities are located in the Tama area , and the remaining 9 are on Tokyo's outlying islands. Tokyo has enacted a measure to cut greenhouse gases. Governor Shintaro Ishihara created Japan's first emissions cap system , aiming to reduce greenhouse gas emission by a total of 25% by 2020 from the 2000 level. Tokyo is an example of an urban heat island , and

13120-422: The associated evacuation zones affecting hundreds of thousands of residents. Many electrical generators ran out of fuel. The loss of electrical power halted cooling systems, causing heat to build up. The heat build-up caused the generation of hydrogen gas. Without ventilation, gas accumulated within the upper refueling hall and eventually exploded causing the refueling hall's blast panels to be forcefully ejected from

13280-470: The city's administrative center; and Shibuya , a commercial, cultural, and business hub in the city. Before the 17th century, Tokyo, then known as Edo , was mainly a fishing village. It gained political prominence in 1603 when it became the seat of the Tokugawa shogunate . By the mid-18th century, Edo was among the world's largest cities, with over a million residents. Following the Meiji Restoration in 1868,

13440-549: The city. The climate of Chichijima in Ogasawara village is on the boundary between the tropical savanna climate (Köppen classification: Aw ) and the tropical rainforest climate (Köppen classification: Af ). It is approximately 1,000 km (621 mi) south of the Greater Tokyo Area , resulting in much different climatic conditions. Tokyo's easternmost territory, the island of Minamitorishima in Ogasawara village ,

13600-510: The coast from Hokkaido to Kyushu in a 2012 study. Maximum run-up heights greater than 10 meters (33 ft) were distributed along 530 kilometers (330 mi) of coast, and maximum run-up heights greater than 20 meters (66 ft) were distributed along 200 kilometers (120 mi) of the coast, measured directly. The tsunami resulted in significant erosion of the Rikuzen-Takata coastline, mainly caused by backwash. A 2016 study indicated that

13760-456: The coast has not naturally recovered at a desirable rate since the tsunami. A Japanese government study found that 58% of people in coastal areas in Iwate, Miyagi, and Fukushima prefectures heeded tsunami warnings immediately after the quake and headed for higher ground. Of those who attempted to evacuate after hearing the warning, only five percent were caught in the tsunami. Of those who did not heed

13920-424: The coastlines affected by the tsunami waves. JMA also reported offshore tsunami height recorded by telemetry from moored GPS wave-height meter buoys as follows: On 25 March 2011, Port and Airport Research Institute (PARI) reported tsunami height by visiting the port sites as follows: The tsunami at Ryōri Bay ( 綾里湾 ), Ōfunato reached a height of 40.1 meters (132 ft) (run-up elevation). Fishing equipment

14080-616: The country, leading to Japan joining the Second World War as an Axis power . Due to the country's political isolation on the international stage caused by its military aggression in China and the increasingly unstable geopolitical situations in Europe, Тоkуо had to give up hosting the 1940 Summer Olympics in 1938. Rationing started in June 1940 as the nation braced itself for another world war, while

14240-514: The country, was established in Tokyo in 1889, and it has ever since been operating in the city. On 1 September 1923, the Great Kanto Earthquake struck the city, and the earthquake and subsequent fire killed an estimated 105,000 citizens. The loss amounted to 37 percent of the country's economic output. On the other hand, the destruction provided an opportunity to reconsider the planning of the city, which had changed its shape hastily after

14400-471: The day by 1.8 microseconds due to the redistribution of Earth's mass. The axial shift was caused by the redistribution of mass on the Earth's surface, which changed the planet's moment of inertia . Because of conservation of angular momentum , such changes of inertia result in small changes to the Earth's rate of rotation. These are expected changes for an earthquake of this magnitude. The earthquake also generated infrasound waves detected by perturbations in

14560-442: The daytime, the population swells by over 2.5 million as workers and students commute from adjacent areas. This effect is even more pronounced in the three central wards of Chiyoda , Chūō , and Minato , whose collective population as of the 2005 National Census was 326,000 at night, but 2.4 million during the day. According to April 2024 official estimates, Setagaya (942,003), Nerima (752,608), and Ota (748,081) were

14720-457: The early Meiji period , the city was sometimes called "Tōkei", an alternative pronunciation for the same characters representing "Tokyo", making it a kanji homograph . Some surviving official English documents use the spelling "Tokei"; however, this pronunciation is now obsolete. Tokyo was originally a village called Edo , part of the old Musashi Province . Edo was first fortified by the Edo clan in

14880-565: The earthquake and new cultural and liberal political movements, such as Taishō Democracy , spread, the 1930s saw an economic downturn caused by the Great Depression and major political turmoil. Two attempted military coups d'état happened in Tokyo, the May 15 incident in 1932 and the February 26 incident in 1936. This turmoil eventually allowed the military wings of the government to take control of

15040-492: The earthquake caused such a dramatic change in the Earth's rotation came from the United States Geological Survey which monitors Global Positioning Satellite (GPS) stations across the world. The Survey team had several GPS monitors located near the scene of the earthquake. The GPS station located nearest the epicenter moved almost 4 m (13 ft). This motivated government researchers to look into other ways

15200-496: The earthquake may have had large scale effects on the planet. Calculations at NASA's Jet Propulsion Laboratory determined that the Earth's rotation was changed by the earthquake to the point where the days are now 1.8 microseconds shorter. Japan experienced over 1,000 aftershocks since the earthquake, with 80 registering over magnitude 6.0 M w and several of which have been over magnitude 7.0 M w . A magnitude 7.4 M w at 15:08 (JST), 7.9 M w at 15:15 and

15360-401: The earthquake occurred, by which time the calculation for the moment magnitude scale would normally be completed. However, the strong quake had exceeded the measurement limit of all of the teleseismometers within Japan, and thus it was impossible to calculate the moment magnitude based on data from those seismometers. Another cause of delayed evacuations was the release of the second update on

15520-436: The earthquake was calculated to be 1.9×10 joules , which is nearly double that of the 9.1 M w 2004 Indian Ocean earthquake and tsunami that killed 230,000 people. If harnessed, the seismic energy from this earthquake would power a city the size of Los Angeles for an entire year. The seismic moment (M 0 ), which represents a physical size for the event, was calculated by the USGS at 3.9×10 joules, slightly less than

15680-482: The east end of the city ( shitamachi , 下町), an area with a high concentration of factories and working-class houses. Two-fifths of the city were completely burned, more than 276,000 buildings were destroyed, 100,000 civilians were killed, and 110,000 more were injured. Numerous Edo and Meiji-era buildings of historical significance were destroyed, including the main building of the Imperial Palace , Sensō-ji , Zōjō-ji , Sengaku-ji and Kabuki-za . Between 1940 and 1945,

15840-514: The entire state of California . The Tokyo Stock Exchange became the largest stock exchange in the world by market capitalization, with the Tokyo-based NTT becoming the most highly valued company globally. After the bubble burst in the early 1990s, Japan experienced a prolonged economic downturn called the " Lost Decades ", which was charactized by extremely low or negative economic growth, deflation, stagnant asset prices. Tokyo's status as

16000-427: The epicenter experienced the largest shifts. A 400-kilometer (250 mi) stretch of coastline dropped vertically by 0.6 meters (2 ft 0 in), allowing the tsunami to travel farther and faster onto land. One early estimate suggested that the Pacific plate may have moved westward by up to 20 meters (66 ft), and another early estimate put the amount of slippage at as much as 40 m (130 ft). On 6 April,

16160-431: The epicenter; the earthquake occurred 373 km (232 mi) northeast of Tokyo . The main earthquake was preceded by a number of large foreshocks , with hundreds of aftershocks reported. One of the first major foreshocks was a 7.2 M w event on 9 March, approximately 40 km (25 mi) from the epicenter of the 11 March earthquake, with another three on the same day in excess of 6.0 M w . Following

16320-487: The first to open in the world at any given time. The two-time-zone system was implemented in Japan between January 1896 and September 1937: From October 1937, Central Standard Time was also used in western Okinawa and Taiwan. The IANA time zone database contains one zone for Japan in the file zone.tab , named Asia/Tokyo . From 1948 to 1952, Japan observed daylight saving time (DST) between May and September every year. The United States imposed this policy as part of

16480-512: The five-storey pagoda and the Shimizudo. The Nezu Shrine and Gokokuji were built by the fifth shogun Tsunayoshi Tokugawa in the late 1600s. All feudal lords ( daimyo ) had large Edo houses where they stayed when in Edo; at one point, these houses amounted to half the total area of Edo. None of the grand Edo-era daimyo houses still exist in Tokyo, as their vast land footprint made them easy targets for redevelopment programs for modernization during

16640-402: The highest possible tsunami. Because tsunami walls had been overtopped , the committee also suggested, besides building taller tsunami walls, also teaching citizens how to evacuate if a large-scale tsunami should strike. Large parts of Kuji and the southern section of Ōfunato including the port area were almost entirely destroyed. Also largely destroyed was Rikuzentakata , where the tsunami

16800-573: The imperial capital in Kyoto was moved to Edo, and the city was renamed Tokyo ( lit.   ' Eastern Capital ' ). In 1923, Tokyo was damaged substantially by the Great Kantō earthquake , and the city was later badly damaged by allied bombing raids during World War II . Beginning in the late 1940s, Tokyo underwent rapid reconstruction and expansion that contributed to the era's so-called Japanese economic miracle in which Japan's economy propelled to

16960-483: The initial stages of the war and rapidly expanded its sphere of influence, the Doolittle Raid on 18 April 1942, marked the first direct foreign attack on Tokyo. Although the physical damage was minimal, the raid demonstrated the vulnerability of the Japanese mainland to air attacks and boosted American morale. Large-scale Allied air bombing of cities in the Japanese home islands, including Tokyo, began in late 1944 when

17120-446: The late twelfth century. In 1457, Ōta Dōkan built Edo Castle to defend the region from the Chiba clan . After Dōkan was assassinated in 1486, the castle and the area came to be possessed by several feudal lords. In 1590, Tokugawa Ieyasu was granted the Kantō region by Toyotomi Hideyoshi and moved there from his ancestral land of Mikawa Province . He greatly expanded the castle, which

17280-543: The latter is the tallest tower in both Japan and the world, and the second tallest structure in the world after the Burj Khalifa in Dubai . With a scheduled completion date in 2027, Torch Tower (385m) will overtake Azabudai Hills Mori JP Tower (325.2m) as the tallest building in Tokyo. Kenzo Tange designed notable contemporary buildings in Tokyo, including Yoyogi National Gymnasium (1964), St. Mary's Cathedral (1967), and

17440-431: The low-orbiting Gravity Field and Steady-State Ocean Circulation Explorer satellite. Initially, the earthquake caused sinking of part of Honshu's Pacific coast by up to roughly a meter, but after about three years, the coast rose back and then kept on rising to exceed its original height. This megathrust earthquake was a recurrence of the mechanism of the earlier 869 Sanriku earthquake , which has been estimated as having

17600-406: The main earthquake on 11 March, a 7.4 M w aftershock was reported at 15:08 JST (6:06 UTC), succeeded by a 7.9 M w at 15:15 JST (6:16 UTC) and a 7.7 M w at 15:26 JST (6:26 UTC). Over 800 aftershocks of magnitude 4.5 M w or greater occurred after the initial quake. Aftershocks followed Omori's law , which states that the rate of aftershocks declines with the reciprocal of

17760-629: The main palace buildings and the tenshu tower have been lost. Numerous temple and shrine buildings in Tokyo date from this era: the Ueno Toshogu still maintains the original 1651 building built by the third shogun Iemitsu Tokugawa . Although partially destroyed during the Second World War, Zojo-ji , which houses the Tokugawa family mausoleum, still has grand Edo-era buildings such as the Sangedatsu gate. Kaneiji has grand 17th-century buildings such as

17920-685: The main shock hit Japan, and continued to occur for 3 hours, during which waves of up to 1.5 meters high were observed. Soil liquefaction was evident in areas of reclaimed land around Tokyo, particularly in Urayasu , Chiba City , Funabashi , Narashino (all in Chiba Prefecture ) and in the Koto , Edogawa , Minato , Chūō , and Ōta Wards of Tokyo. Approximately 30 homes or buildings were destroyed and 1,046 other buildings were damaged to varying degrees. Nearby Haneda Airport , built mostly on reclaimed land,

18080-437: The majority of Tokyo prefecture lie in the humid subtropical climate zone ( Köppen climate classification : Cfa ), with hot, humid summers and mild to cool winters with occasional cold spells. The region, like much of Japan, experiences a one-month seasonal lag . The warmest month is August, which averages 26.9 °C (80.4 °F). The coolest month is January, averaging 5.4 °C (41.7 °F). The record low temperature

18240-422: The majority of its resources to rebuilding in the wake of the consistent fires, earthquakes , and other devastating natural disasters that plagued the city. Edo grew into one of the largest cities in the world with a population reaching one million by the 18th century. This prolonged period of seclusion however came to an end with the arrival of American Commodore Matthew C. Perry in 1853. Commodore Perry forced

18400-455: The marriage of a shogun's daughter into the Maeda clan , one of the most affluent of the feudal lords, while the campus itself occupies their former edo estate. The Meiji era saw a rapid modernization in architectural styles as well; until the Great Kanto Earthquake in 1923 exposed their weakness to seimic shocks, grand brick buildings were constantly built across the city. Tokyo Station (1914),

18560-635: The maximum of 7 on the Japan Meteorological Agency seismic intensity scale in Kurihara , Miyagi Prefecture . Three other prefectures— Fukushima , Ibaraki and Tochigi —recorded a 6 upper on the JMA scale. Seismic stations in Iwate , Gunma , Saitama and Chiba Prefecture measured a 6 lower, recording a 5 upper in Tokyo. Portions of northeastern Japan shifted by as much as 2.4 meters (7 ft 10 in) closer to North America, making some sections of Japan's landmass wider than before. Those areas of Japan closest to

18720-413: The most populous wards and municipalities in Tokyo. The least inhabited of all Tokyo municipalities are remote island villages such as Aogashima (150), Mikurajima (289), and Toshima (306). In 2021, Tokyo's average and median ages were both 45.5 years old. This is below the national median age of 49.0, placing Tokyo among the youngest regions in Japan. 16.8% of the population was below 15, while 34.6%

18880-408: The new gateway to the city, while the relatively small Haneda Airport switched to primarily domestic flights. West Shinjuku , which had been occupied by the vast Yodobashi Water Purification Centre until 1965, became the site of an entirely new business district characterized by skyscrapers surpassing 200 metres during this period. The American-led Plaza Accord in 1985, which aimed to depreciate

19040-440: The north to Ōarai, Ibaraki , in the south, with most of the destruction in that area occurring in the hour following the earthquake. Near Ōarai, people captured images of a huge whirlpool that had been generated by the tsunami. The tsunami washed away the sole bridge to Miyatojima, Miyagi, isolating the island's 900 residents. A 2 meters (6 ft 7 in) high tsunami hit Chiba Prefecture about 2 + 1 ⁄ 2 hours after

19200-548: The opening of the ports of Shimoda and Hakodate , leading to an increase in the demand for new foreign goods and subsequently a severe rise in inflation. Social unrest mounted in the wake of these higher prices and culminated in widespread rebellions and demonstrations, especially in the form of the "smashing" of rice establishments. Meanwhile, supporters of the Emperor leveraged the disruption caused by widespread rebellious demonstrations to further consolidate power, which resulted in

19360-499: The orbit of the GOCE satellite, which thus serendipitously became the first seismograph in orbit. Following the earthquake, cracks were observed to have formed in the roof of Mount Fuji 's magma chamber . Seiches observed in Sognefjorden , Norway were attributed to distant S waves and Love waves generated by the earthquake. These seiches began to occur roughly half an hour after

19520-493: The overthrow of the Tokugawa shogunate , for the first time in a few centuries, the Emperor ceased to be a mere figurehead and became both the de facto and de jure ruler of the country. Hisoka Maejima advocated for the relocation of the capital functions to Tokyo, recognizing the advantages of the existing infrastructure and the vastness of the Kanto Plain compared to the relatively small Kyoto basin . After being handed over to

19680-616: The overthrow of the last Tokugawa shōgun, Yoshinobu , in 1867. After 265 years, the Pax Tokugawa came to an end. In May 1868, Edo castle was handed to the Emperor-supporting forces after negotiation (the Fall of Edo ). Some forces loyal to the shogunate kept fighting, but with their loss in the Battle of Ueno on 4 July 1868, the entire city came under the control of the new government . After

19840-477: The phenomenon is especially serious in its special wards. According to the Tokyo Metropolitan Government, the annual mean temperature has increased by about 3 °C (5.4 °F) over the past 100 years. Tokyo has been cited as a "convincing example of the relationship between urban growth and climate". In 2006, Tokyo enacted the "10 Year Project for Green Tokyo" to be realized by 2016. It set

20000-458: The populace warning did not trigger. According to the Japan Meteorological Agency , reasons for the underestimation include a saturated magnitude scale when using maximum amplitude as input, failure to fully take into account the area of the hypocenter , and the initial amplitude of the earthquake being less than that which would be predicted by an empirical relationship. There were also cases where large differences between estimated intensities by

20160-556: The population of Tokyo dwindled from 6,700,000 to less than 2,800,000, as soldiers were sent to the front and children were evacuated. After the war, Tokyo became the base from which the Allied Occupation Forces , under Douglas MacArthur , an American general, administered Japan for six years. The original rebuilding plan of Tokyo was based on a plan modelled after the Metropolitan Green Belt of London , devised in

20320-818: The public on limited occasions. Aristocratic residences today open to the public include the Marquess Maeda residence in Komaba , the Baron Iwasaki residence in Ikenohata and the Baron Furukawa residence in Nishigahara. The Great Kanto Earthquake in 1923 ushered in an era of concrete architecture. Surviving reinforced concrete buildings from this era include the Meiji Insurance Headquarters (completed in 1934),

20480-522: The quake, causing heavy damage to cities such as Asahi . On 13 March 2011, the Japan Meteorological Agency (JMA) published details of tsunami observations recorded around the coastline of Japan following the earthquake. These observations included tsunami maximum readings of over 3 meters (9.8 ft) at the following locations and times on 11 March 2011, following the earthquake at 14:46 JST: Many areas were also affected by waves of 1 to 3 meters (3 ft 3 in to 9 ft 10 in) in height, and

20640-538: The resignation of her predecessor, Yoichi Masuzoe . She was re-elected in 2020 and in 2024. The legislature of the Metropolis is called the Metropolitan Assembly , and it has one house with 127 seats. The assembly is responsible for enacting and amending prefectural ordinances, approving the budget (8.5 trillion yen in fiscal 2024), and voting on important administrative appointments made by the governor, including

20800-547: The second Saturday in September at 24:00 (with the exception of 1949, when the spring forward transition was the first Saturday in April at 24:00). More recently there have been efforts to restore daylight saving time in Japan but these have not succeeded. In May 2013, former Tokyo governor Naoki Inose proposed permanently moving the country's time zone ahead by 2 hours to better align global markets and make Japan's stock market to be

20960-487: The situation is under observation. About 90 seconds after an earthquake, an additional report on the possibility of a tsunami will also be included in observation reports, in order to warn people before the JMA magnitude can be calculated. Japan Standard Time Japan Standard Time is equivalent to Korean Standard Time , Pyongyang Time ( North Korea ), Eastern Indonesia Standard Time , East-Timorese Standard Time , Palau Time , and Yakutsk Time ( Russia ). Before

21120-478: The source area and the seismic moment, it was estimated that the slip deficit of this earthquake was accumulated over a period of 260–880 years, which is consistent with the recurrence interval of such great earthquakes estimated from the tsunami deposit data. The seismic moment of this earthquake accounts for about 93% of the estimated cumulative moment from 1926 to March 2011. Hence, earthquakes in this area with magnitudes of about 7 since 1926 had only released part of

21280-691: The structure. Residents within a 20 km (12 mi) radius of the Fukushima Daiichi Nuclear Power Plant and a 10 km (6.2 mi) radius of the Fukushima Daini Nuclear Power Plant were evacuated. Early estimates placed insured losses from the earthquake alone at US$ 14.5 to $ 34.6 billion. The Bank of Japan offered ¥ 15 trillion (US$ 183 billion) to the banking system on 14 March 2011 in an effort to normalize market conditions. The estimated economic damages amounted to over $ 300 billion, making it

21440-486: The third says the standard time zone would be in effect from 1888. The city of Akashi in Hyōgo Prefecture is located exactly on 135 degrees east longitude and subsequently became known as Toki no machi (Town of Time). With the annexation of Taiwan in 1895, Ordinance 167 (pictured on the right) was issued to rename the previous Standard Time to Central Standard Time ( 中央標準時 , Chūō Hyōjunji ) and establish

21600-485: The time in Tokyo. In 1886, Ordinance 51 was issued in response to this problem, which stated: Ordinance 51 (on the precise calculation of time using the Prime Meridian) – July 13, 1886 According to this, the standard time ( 標準時 , hyōjunji ) was set 9 hours ahead of GMT (UTC had not been established yet). In the ordinance, the first clause mentions GMT, the second defines east longitude and west longitude and

21760-470: The time since the main quake. The aftershocks thus tapered off over time, but continued for years after the initial quake, including one on 26 October 2013 (local time) of magnitude 7.1 M w . The earthquake moved Honshu 2.4 m (8 ft) east, shifted the Earth on its axis by estimates of between 10 and 25 cm (4 and 10 in), increased Earth's rotational speed by 1.8 μs per day, and generated infrasound waves detected in perturbations of

21920-434: The time the Allied occupation of Japan ended in 1952, Tokyo's focus shifted from rebuilding to developing beyond its pre-war stature. From the 1950s onwards, Tokyo's Metro and railway network saw significant expansion, culminating in the launch of the world's first dedicated high-speed railway line, the Shinkansen , between Tokyo and Osaka in 1964. The same year saw the development of other transport infrastructure such as

22080-507: The total to 700,000. As of 2014 , roadside trees in Tokyo have increased to 950,000, and a further 300 ha (740 acres) of green space has been added. Tokyo is the seat of all three branches of government : the legislature ( National Diet ), the executive ( Cabinet led by the Prime Minister ), and the judiciary ( Supreme Court of Japan ), as well as the Emperor of Japan , the head of state. Most government ministries are concentrated in

22240-598: The town by 14 March 2011. Among the factors in the high death toll was the unexpectedly large water surge. The sea walls in several cities had been built to protect against tsunamis of much lower heights. Also, many people caught in the tsunami thought they were on high enough ground to be safe. According to a special committee on disaster prevention designated by the Japanese government, the tsunami protection policy had been intended to deal with only tsunamis that had been scientifically proved to occur repeatedly. The committee advised that future policy should be to protect against

22400-546: The tsunami hit. The official figures released in 2021 reported 19,759 deaths, 6,242 injured, and 2,553 people missing, and a report from 2015 indicated 228,863 people were still living away from their home in either temporary housing or due to permanent relocation. The tsunami caused the Fukushima Daiichi nuclear disaster , primarily the meltdowns of three of its reactors, the discharge of radioactive water in Fukushima and

22560-454: The tsunami warning long after the earthquake (28 minutes, according to observations); by that time, power failures and similar circumstances reportedly prevented the update from reaching some residents. Also, observed data from tidal meters that were located off the coast were not fully reflected in the second warning. Furthermore, shortly after the earthquake, some wave meters reported a fluctuation of "20 centimeters (7.9 in)", and this value

22720-426: The upper plate down until the accumulated stress causes a seismic slip-rupture event. The break caused the sea floor to rise by several meters. The magnitude of this earthquake was a surprise to some seismologists. A quake of this magnitude usually has a rupture length of at least 500 km (310 mi) and generally requires a long, relatively straight fault surface. Because the plate boundary and subduction zone in

22880-455: The vice governors. Its members are also elected on a four-year cycle. Since the completion of the Great Mergers of Heisei in 2001, Tokyo consists of 62 municipalities : 23 special wards , 26 cities , 5 towns and 8 villages . All municipalities in Japan have a directly elected mayor and a directly elected assembly, each elected on independent four-year cycles. The 23 Special Wards cover

23040-419: The warning, 49% were hit by the water. Delayed evacuations in response to the warnings had a number of causes. The tsunami height that had been initially predicted by the tsunami warning system was lower than the actual tsunami height; this error contributed to the delayed escape of some residents. The discrepancy arose as follows: in order to produce a quick prediction of a tsunami's height and thus to provide

23200-441: The wind blows north-east it could send volcanic ash to Tokyo metropolis. According to the government, less than a millimeter of the volcanic ash from a Mount Fuji eruption could cause power grid problems such as blackouts and stop trains in the Tokyo metropolitan area. A mixture of ash with rain could stick to cellphone antennas, power lines and cause temporary power outages. The affected areas would need to be evacuated. Tokyo

23360-846: Was a leading figure in this movement, and his extant works in Tokyo include Tsukiji Hongan-ji (1934). The Imperial Crown Style , which often features Japanese-style roofs on top of elevated concrete structures, was adopted for the Tokyo National Museum in Ueno and the Kudan Hall in Kudanminami . Since the 30-metre height restriction was lifted in the 1960s, Tokyo's most dense areas have been dominated by skyscrapers. As of May 2024, there are at least 184 buildings exceeding 150 metres (492 feet) in Tokyo. Apart from these, Tokyo Tower (333m) and Tokyo Sky Tree (634m) feature high-elevation observation decks;

23520-454: Was abolished by Ordinance 529 in 1937 and replaced by Central Standard Time in those areas. Territories occupied by Japan during World War II, including Singapore and Malaya , adopted Japan Standard Time for the duration of their occupation, but reverted after Japan's surrender . Between 1948 and 1951 occupied Japan observed daylight saving time (DST) from the first Saturday in May at 24:00 to

23680-604: Was above 65. In the same year, the youngest municipalities in Tokyo were Mikura-jima (average age 40.72), Chuo (41.92), and Chiyoda (42.07), while the oldest included Okutama (59.11) and Miyake (53.82). In 1889, the Home Ministry recorded 1,375,937 people in Tokyo City and a total of 1,694,292 people in Tokyo-fu . In the same year, a total of 779 foreign nationals were recorded as residing in Tokyo. The most common nationality

23840-473: Was also particularly hard hit. At least 101 designated tsunami evacuation sites were hit by the wave. Like the 2004 Indian Ocean earthquake and tsunami , the damage by surging water, though much more localized, was far more deadly and destructive than the actual quake. Entire towns were destroyed in tsunami-hit areas in Japan, including 9,500 missing in Minamisanriku ; one thousand bodies had been recovered in

24000-460: Was based in Kyoto from 794 to 1868, so Edo was still not the capital of Japan. During the Edo period , the city enjoyed a prolonged period of peace known as the Pax Tokugawa , and in the presence of such peace, the shogunate adopted a stringent policy of seclusion, which helped to perpetuate the lack of any serious military threat to the city. The absence of war-inflicted devastation allowed Edo to devote

24160-411: Was broadcast throughout the mass media and the warning system, which caused some residents to underestimate the danger of their situation and even delayed or suspended their evacuation. In response to the aforementioned shortcomings in the tsunami warning system, JMA began an investigation in 2011 and updated their system in 2013. In the updated system, for a powerful earthquake that is capable of causing

24320-530: Was completed in 2006. The MAOUDC is a 6.3 km (3.9 mi) long system of tunnels, 22 meters (72 ft) underground, with 70-meter (230 ft) tall cylindrical tanks, each tank being large enough to fit a space shuttle or the Statue of Liberty. During floods, excess water is collected from rivers and drained to the Edo River . Low-lying areas of Kōtō , Edogawa , Sumida , Katsushika , Taitō and Arakawa near

24480-428: Was cut off across much of northern Japan including the loss of external power to Higashidōri Nuclear Power Plant and Rokkasho Reprocessing Plant . Four days later on 11 April, another magnitude 7.1 M w aftershock struck Fukushima, causing additional damage and killing a total of three people. On 7 December 2012 a large aftershock of magnitude 7.3 M w caused a minor tsunami, and again on 26 October 2013

24640-653: Was not damaged. Odaiba also experienced liquefaction, but damage was minimal. Shinmoedake , a volcano in Kyushu , erupted three days after the earthquake. The volcano had previously erupted in January 2011; it is not known if the later eruption was linked to the earthquake. In Antarctica , the seismic waves from the earthquake were reported to have caused the Whillans Ice Stream to slip by about 0.5 meters (1 ft 8 in). The first sign international researchers had that

24800-479: Was said to have been abandoned and in tatters when he moved there, and ruled the region from there. When he became shōgun , the de facto ruler of the country, in 1603, the whole country came to be ruled from Edo. While the Tokugawa shogunate ruled the country in practice, the Imperial House of Japan was still the de jure ruler, and the title of shōgun was granted by the Emperor as a formality. The Imperial House

24960-498: Was scattered on the high cliff above the bay. At Tarō, Iwate , the tsunami reached a height of 37.9 meters (124 ft) up the slope of a mountain some 200 meters (660 ft) away from the coastline . Also, at the slope of a nearby mountain from 400 meters (1,300 ft) away at Aneyoshi fishery port ( 姉吉漁港 ) of Omoe peninsula ( 重茂半島 ) in Miyako, Iwate , Tokyo University of Marine Science and Technology found estimated tsunami run up height of 38.9 meters (128 ft). This height

25120-465: Was struck by waves 2 meters (6.6 ft) high, compared with an estimated wave height of 38.9 meters (128 ft) at Omoe peninsula, Miyako city, Japan. The tsunami warning issued by the Japan Meteorological Agency was the most serious on its warning scale; it was rated as a "major tsunami", being at least 3 meters (9.8 ft) high. The actual height prediction varied, the greatest being for Miyagi at 6 meters (20 ft) high. The tsunami inundated

25280-433: Was subsequently modified to handle this kind of situation. An upthrust of 6 to 8 meters (20 to 26 ft) along a 180-kilometer (110 mi)-wide seabed at 60 kilometers (37 mi) offshore from the east coast of Tōhoku resulted in a major tsunami that brought destruction along the Pacific coastline of Japan's northern islands. Thousands of people died and entire towns were devastated. The tsunami propagated throughout

25440-653: Was three stories high. Other cities destroyed or heavily damaged by the tsunami include Kamaishi , Miyako , Ōtsuchi , and Yamada (in Iwate Prefecture), Namie , Sōma , and Minamisōma (in Fukushima Prefecture) and Shichigahama , Higashimatsushima , Onagawa , Natori , Ishinomaki , and Kesennuma (in Miyagi Prefecture). The most severe effects of the tsunami were felt along a 670-kilometer-long (420 mi) stretch of coastline from Erimo, Hokkaido , in

25600-407: Was −9.2 °C (15.4 °F) on January 13, 1876. The record high was 39.5 °C (103.1 °F) on July 20, 2004. The record highest low temperature is 30.3 °C (86.5 °F), on August 12, 2013, making Tokyo one of only seven observation sites in Japan that have recorded a low temperature over 30 °C (86.0 °F). Annual rainfall averages nearly 1,600 millimeters (63.0 in), with

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