Mu River (鵡川, Mu-kawa) is a river in Hokkaido, Japan.

Located in Kamikawa and Iburi subprefectures, it is one of 13 Class A rivers on the island.

The Mu River rises on the slopes of Mount Karifuri in the Hidaka Mountains.

[1] It flows south and west until it reaches the Pacific Ocean at Mukawa.

This article related to a river in Japan is a stub.