TheSakai River (境川,Sakai-gawa) is aClass B river inTokyo andKanagawa Prefecture which flows into theBay of Sagami of thePacific Ocean.
The Sakai River has with the length of 52.1 km and the basin size of 210.7 square km. It starts from Aihara-machi (Japanese:相原町),Machida, Tokyo, to Katase,Fujisawa, Kanagawa, nearEnoshima Island. It is called "Sakai", meaning "border", because it flows on the border of the former provinces ofMusashi andSagami.[1]
As the Sakai River and its tributaries are prone to flooding (especially in spring and during the typhoon season), as a protection they were encased in concrete during the postwar period. The rivers continue to flood, but do not overflow their banks as frequently as in the past.
The river often used to be called theTakakura River (Japanese:高座川) because it flowed throughKōza District, Kanagawa (Japanese:高座郡), theKun'yomi reading of the two "Kōza"Kanji characters being Takakura. Also, the short section of the river from the point where it is joined by theKashio River to the mouth of the river is sometimes called theKatase River.
There are walking and bicycle routes along the banks of the Sakai River, fromMachida, Tokyo, to the river mouth in Fujisawa, Kanagawa.[2]
Mooring of pleasure boats in the river is now prohibited.
TheKatase River (片瀬川,Katase-gawa) is a segment of the Sakai River inShōnan, centralJapan, about 50 kilometers southwest ofTokyo. The Katase is an approximately 3-kilometer-long segment of the Sakai River fromKawana [ja] (川名),Fujisawa, where the Sakai River andKashio River join, to a point atEnoshima Island, where the river flows intoSagami Bay. The river's name comes from Fujisawa City's Katase area through which it flows, at the foot ofKataseyama (片瀬山), and goes under the Katase Bridge ofRoute 134, before it meets Sagami Bay beside Katase Fisheries Port.
35°18′19″N139°28′52″E / 35.305381°N 139.481222°E /35.305381; 139.481222 (mouth)
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