Bifuka is a town in Kamikawa Subprefecture, Hokkaido, Japan. As of September 2016, the town had an estimated population of 4,609 and a density of 6.9 persons per km2. The total area is 672.14 square kilometres (259.51 sq mi).

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.