Rivers
Osarappe River
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- Takasu Bridge Water Level Observatory, Osarappe River Left Bank 4.8KP | Osarappe River Takasu Bridge Water Level Observation Station, Takasucho Jussen, Kamikawa District, Hokkaido 071-1250 | Hokkaido Development Bureau
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- Osarappe River 9.0KP right bank | Juyonsen, Takasu-cho, Kamikawa-gun, Hokkaido 071-1254 | Ministry of Land, Infrastructure, Transport and Tourism
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- Osarappe River 11.5KP right bank | Jurokusen, Takasu-cho, Kamikawa-gun, Hokkaido 071-1256 | Ministry of Land, Infrastructure, Transport and Tourism
Nanago River
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- Nanago River 0.2KP | Juichisen, Takasu-cho, Kamikawa-gun, Hokkaido 071-1251 | Ministry of Land, Infrastructure, Transport and Tourism