Tsugaru clan
During the Edo period, Hiranai was a village. On 17 September 1656, the village became part of Kuroishi Domain controlled by the Tsugaru clan. Up to the middle of the Edo period, the isolated areas of Hiranai were some of the last sanctuaries for the Ainu people in Honshu. However, they were assimilated into the rest of the population by pushes made by the ruling Tsugaru clan in 1756 and 1809. In July 1871, with the abolition of the han system, Kuroishi Domain briefly became Kuroishi Prefecture, and was merged into the newly created Aomori Prefecture in September 1871. During the cadastral reform of 1889, Natsudomari Peninsula was divided into the three villages of Naka-Hiranai, Nishi-Hiranai, and Higashi-Hiranai. On 1 October 1928, Naka-Hiranai became a town, renaming itself Kominato.