Ichinomiya (一宮町, Ichinomiya-chō) was a town located in Higashiyatsushiro District, Yamanashi Prefecture, Japan. As of 2003, the town had an estimated population of 11,111 and a density of 362.87 persons per km2. The total area was 30.62 km2. Ichinomiya literally means "the first shrine" of the province. In case of this town, it is the Sengen Shrine of the Kai Province.