利根川（日语：利根川／とねがわ Tonegawa），长约322公里，流域面积16,840平方公里，是日本国内第二长，流域面积最大个河流，长度只信浓川短。伊个别名“坂东太郎”，坂东是关东个旧名字，太郎是大儿子个意思，是东京搭首都圈个重要水源。
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