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18-539: Ryūgasaki is located in southern Ibaraki Prefecture, in the low-lying flatlands south of Lake Kasumigaura . The Kokai River runs through the western part of the city, and the basin is dotted with tributaries and lakes. Lake Ushiku, despite its name, is entirely within the city of Ryūgasaki. Ibaraki Prefecture Ryūgasaki has a Humid continental climate (Köppen Cfa ) characterized by warm summers and cool winters with light snowfall. The average annual temperature in Ryūgasaki

36-413: A ban on the use and sale of phosphate-containing synthetic detergents , and the control of nitrogen and phosphorus contents in the effluent from factories. In order to help maintain the lake, dredging work is being carried out around the lake and at the estuaries of main inflowing rivers, such as Sakura River (桜川). Ry%C5%ABgasaki Airfield Ryūgasaki Airfield ( 龍ヶ崎飛行場 , Ryūgasaki Hikōjō )

54-426: A group of contiguous lakes , which includes Lake Kasumigaura proper, hereby referred to as Nishiura (西浦), and two smaller lakes, Kitaura (北浦; 35.16 km ) and Sotonasakaura (外浪逆浦; 5.85 km ), and also encompasses the rivers connecting them. In this case the total area is 220 km . About 45% of the land surrounding the lake is natural landscape and 43.5% is agricultural land. Lake Kasumigaura originally

72-546: Is 14.5 °C (58.1 °F). The average annual rainfall is 1,352.8 mm (53.26 in) with October as the wettest month. The temperatures are highest on average in August, at around 25.8 °C (78.4 °F), and lowest in January, at around 3.3 °C (37.9 °F). Per Japanese census data, the population of Ryūgasaki has recently plateaued after several decades of growth. The name "Ryūgasaki" can be traced back to 1182 when

90-436: Is a privately owned airfield in the city Ryūgasaki, Ibaraki , Japan . The airport was opened on November 11, 1969, as a private venture by Nissho Iwai . Although there are no scheduled flights, it is a base for light aircraft and pilot training. Due to its proximity to Narita International Airport , the airspace around the airport is under traffic control by Narita, and there are certain restrictions on operations. The runway

108-433: Is cultivated carp, followed by smelt and goby. Another cultivated treasure from Lake Kasumigaura is the beautiful Kasumi freshwater pearls . They were known for their high luster and rosy hues, which is the result of a four-year cultivation period. However, in 2006, cultivation was discontinued as cheap freshwater pearls from China proved too difficult to compete against. The water from Lake Kasumigaura has long been used for

126-449: The Eurasian coot are a few of the birds seen around the lake. Lake Kasumigaura provides over 60 tons of water per second; most goes to agriculture (83%). The rest is provided to local industry (13%) and public (4%) in the prefectures of Ibaraki , Chiba and Tokyo . Eutrophication is a serious problem for Lake Kasumigaura. Legislation was enacted in 1982 to help prevent it, including

144-556: The Hobikibune (帆引き船) sailed fishing boats which are unique to Lake Kasumigaura. The Suigo aquapark , located in Tsuchiura , is popular during the hottest months. The windmill of Kasumigaura comprehensive park is a popular site along the shores throughout the year and especially in the spring when the tulips are flowering. The lake is a recreation hotspot. Sport fishing enthusiasts and anglers can be found close to shore and around

162-553: The Nara period as the Tone River . However, by the Meiji period , the course of the river had shifted, leaving the area of present-day southern Ryūgasaki on the northern bank of the river. This area was transferred to Ibaraki Prefecture in 1875 The town of Ryūgasaki was created with the establishment of the modern municipalities system on April 1, 1889. The city was formed on March 20, 1954, when

180-536: The Pinus , and Platycodon grandiflorus as its city symbols for bird, tree and flower respectively. Ryūgasaki has a mayor-council form of government with a directly elected mayor and a unicameral city council of 22 members. Ryūgasaki, together with neighboring Tone, contributes two members to the Ibaraki Prefectural Assembly. In terms of national politics, the city is part of Ibaraki 3rd district of

198-457: The lower house of the Diet of Japan . The 20th and current mayor is ( 萩原　勇 ) Isamu Hagiwara, who assumed the position on January 18, 2022. Issei Nakayama ( 中山 一生 ) was the seventeenth to nineteenth mayor, beginning in January 2010. New Central Airlines , a commuter airline , is headquartered in the city, on the grounds of Ryūgasaki Airfield , although no commercial flights are scheduled from

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216-453: The aforementioned town merged with: Nareshiba  [ ja ] , Ōmiya  [ ja ] , Yabara  [ ja ] , Nagato  [ ja ] , Kawarashiro  [ ja ] and Kitamonma  [ ja ] . In February 1955, the city grew to its present size when a proportion of Takasu  [ ja ] merged with the city. In 1974, the city adopted the Swan ,

234-471: The city. [REDACTED] JR East – Jōban Line Kantō Railway - Ryūgasaki Line Lake Kasumigaura Lake Kasumigaura ( 霞ヶ浦 , Kasumigaura ) is the second-largest lake in Japan , located 60 km to the north-east of Tokyo . In a narrower sense and officially, Lake Kasumigaura refers to a waterbody with an area of 167.63 km . In a wider sense, Lake Kasumigaura can also refer to

252-414: The irrigation of paddy fields in the surrounding alluvial plain and upland fields on diluvial terraces covered by thick deposits of volcanic ash . The primary crops are rice and lotus root (a local speciality). Other crops include tomato , cucumber , eggplant , watermelon , corn , edamame , sweet potato , kabocha , daikon and peanut . Many tourists come to the lake in the summer to view

270-553: The river mouths surrounding the lake. Recreational boats , such as yachts , power boats , sail boats and personal watercraft , are regularly enjoyed on warm weekends. The wide surrounding wetlands are wonderful for birdwatching , as large numbers of water fowl can be observed, primarily during the wintering period. Japanese cormorant , Bewick’s swan , little egret , grey heron , mallard , Eurasian wigeon , striated heron , sharp-tailed sandpiper , bush warbler , wood sandpiper , marsh grassbird , Japanese reed bunting , and

288-556: The samurai clan ruling the territory adopted "Ryūgasaki" as their family name. The northern half of the city was an exclave of Sendai Domain during the Edo period , the region joined Miyazaku Prefecture  [ ja ] in 1869 before merging with Ibaraki Prefecture in 1875. The southern portion of the city was part of Kitasōma District in Shimōsa Province , as the boundary between Shimōsa and Hitachi Province had been established in

306-625: Was a brackish-water lagoon , with indirect connections to the Pacific Ocean via the Hitachigawa and Tone Rivers. In 1963, the construction of a gate near the confluence of these rivers disconnected the lake from its sources of ocean water. As a result, the salinity of Lake Kasumigaura declined, and today the lake contains fresh water. This lake was famous for its traditional fishery during the Edo period . But today, fishing production has drastically decreased due to water quality deterioration that

324-438: Was partially caused by the closure of the tide gate in 1963 for purposes of desalination. Today, Lake Kasumigaura is used for fishing , irrigation , tourism , recreation , and for consumption by the surrounding public and local industry. A variety of fish can be caught from the waters of Lake Kasumigaura, including smelt , Japanese icefish , crucian carp , goby , Japanese eel and river prawn . The most popular catch

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