Ichinomiya (一宮町 Ichinomiya-chō) was a town located in Higashiyatsushiro District, Yamanashi, Japan.
On October 12, 2004 Ichinomiya was merged the towns of Isawa, Misaka and Yatsushiro, the village of Sakaigawa, all from Higashiyatsushiro District, and the town of Kasugai, from Higashiyamanashi District, to form the new city of Fuefuki.
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.