Okinoshima is a town located on Dōgo, in Oki District, Shimane Prefecture, Japan. As of June 2013, the town had an estimated population of 14,849 and a population density of 61.1 persons per km2. The total area was 242.95 km2.

Shimane Prefecture is a prefecture of Japan located in the Chūgoku region of Honshu. Shimane Prefecture is the second-least populous prefecture of Japan at 665,205 and has a geographic area of 6,708.26 km2. Shimane Prefecture borders Yamaguchi Prefecture to the southwest, Hiroshima Prefecture to the south, and Tottori Prefecture to the east.