Saru River
 Saru River (沙流川 Saru-gawa) is a river in Hokkaidō Japan.The Saru River rises in the Hidaka Mountains and empties into the Pacific. The Nibutani Dam is situated on the Saru River at Nibutani village. The construction of this dam was the subject of famous domestic litigation producing the first ever Japanese legal decision to recognise the Ainu people as an indigenous people. Construction of a second dam the Biratori Dam is also planned by the Hokkaido Development Board.