Nichinan is a town located in Hino District, Tottori Prefecture, Japan. As of 31 December 2021, the town had an estimated population of 4,144 in 1903 households and a population density of 12 persons per km2. The total area of the town is 340.962 square kilometres (131.646 sq mi), representing 10% of the total area of Tottori Prefecture.Over 90% of the town is covered by mountains and forest, and 5% of the land is arable. Areas of Nichinan are part of Hiba-Dogo-Taishaku Quasi-National Park.

Tottori Prefecture is a prefecture of Japan located in the Chūgoku region of Honshu. Tottori Prefecture is the least populous prefecture of Japan at 538,525 (2023) and has a geographic area of 3,507.13 square kilometres (1,354.11 sq mi). Tottori Prefecture borders Shimane Prefecture to the west, Hiroshima Prefecture to the southwest, Okayama Prefecture to the south, and Hyōgo Prefecture to the east.