Kushima is a city located in Miyazaki Prefecture, Japan. As of 1 November 2023, the city had an estimated population of 15,623 in 6950 households, and a population density of 53 persons per km². The total area of the city is 295.16 km2 (113.96 sq mi).

Miyazaki Prefecture is a prefecture of Japan located on the island of Kyūshū. Miyazaki Prefecture has a population of 1,073,054 as of 1 June 2019 and has a geographic area of 7,735 km2. Miyazaki Prefecture borders Ōita Prefecture to the north, Kumamoto Prefecture to the northwest, and Kagoshima Prefecture to the southwest.