Kamikawa is a subprefecture of Hokkaido Prefecture, Japan. The name is derived from Kamikawa no hitobito no Shūraku, a translation of the Ainu Peni Unguri Kotan. Settlement began in 1867. The sub-prefecture was established in 1897.

Nayoro is a city in Kamikawa Subprefecture, Hokkaido, Japan.