Rumoi River

Rumoi River (留萌川) is a river in Hokkaidō, Japan. The Rumoi is 44 km in length. It traces its source to Mount Poroshiri 731 m in the Hidaka Mountain range, and flows across Rumoi Subprefecture in the west of Hokkaidō and empties into the Sea of Japan. The mouth of the Rumoi River is in the city of Rumoi.