title: Mu River (Hokkaidō)
text: # Mu River (Hokkaidō)
  
  Mu River (鵡川, Mu-kawa) is a river in Hokkaido, Japan. Located in Kamikawa and Iburi subprefectures, it is one of 13 major 'class 1' rivers on the island.
  
  ## Course
  
  The Mu River rises on the slopes of Mount Karifuri in the Hidaka Mountains. It flows south and west until it reaches the Pacific Ocean at Mukawa.
  
  ## Dams
  
  | Class 1 river name | Class 2 river name | Name | Height (m) | Water storage capacity (per 1000 m³) | Type | Operator |
  | - | - | - | - | - | - | - |
  | Mu River | Soshubetsu River | Soshubetsu Dam | 29.0 | 1,330 | Concrete | Hokkaido Electric Power Company |
  | Mu River | Hobetsu River | Hobetsu Dam | 38.2 | 10,330 | Rockfill | Hokkaido Regional Development Bureau |
  
  ## Tributaries
  
  Shimukappu (upper reaches):
  
  * Horoka Tomamu River
  * Soshubetsu River
  * Pankeshuru River
  * Shimu River
  
  Mukawa (lower reaches):
  
  * Ososukenai River
  * Tosano River
  * Horosaru River
  * Hobetsu River
  * Rubeshibe River
  * Kinausu River
  * Inaeppusawa River
  * Niwan River
  * Yunosawa River
  * Chin River
  