総人口：15,335People (June 30, 2014)。area：261.24 km²。
The place name is derived from the Ainu word ku shan y (a place that flows out like a pipe) kucha an nai (a river with a hunting hut)。
Upland farming such as potatoes is flourishing。
Mt. Yotei, Niseko Annupuri, Hokkaido Speed ​​Park, etc. are famous。