Oshino is located in southeastern Yamanashi Prefecture, in the foothills of Mount Fuji.

[2] Per Japanese census data,[3] the population of Oshino has grown steadily over the past 80 years.

During the Edo period, all of Kai Province was tenryō territory under direct control of the Tokugawa shogunate.

With the establishment of the modern municipalities system in the early Meiji period on April 1, 1889, the village of Oshino was created within Minamitsuru District, Yamanashi Prefecture.

[5] The Japan Ground Self-Defense Force Camp Kita-Fuji is located in Oshino.