水系: 利根川水系（東京都）
とねがわすいけい（とうきょうと）
日本の水系>利根川水系>利根川水系（東京都）>
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利根川水系（東京都）の水路>利根川水系（東京都）>
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利根川水系（東京都）の水路>利根川水系（東京都）>