Tokachi River ( 十勝川 , Tokachi-gawa ) is a river in Hokkaidō , Japan .
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1-510: In 1820, the explorer Takeshiro Matsuura (松浦 武四郎) proposed "Tokachi" as the name of the surrounding Tokachi Province , with each character corresponding to a Japanese homophone . The province was named after this river, which in turn was derived from the Ainu language word "tokapci" ( トカㇷ゚チ ) . Although the exact origins of "tokapci" were unknown, Hidezo Yamada, an Ainu language researcher, proposed these origins: This Hokkaidō location article
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