Ibusuki is a city located in Kagoshima Prefecture, Japan, founded on April 1, 1954. In March 1, 2012, the city had an estimated population of 43,931, with 19,119 households and a population density of 294.82 persons per km2. However the census of 2020 confirmed a population decline to 39,011 and by October 2022 there were only 17,537 households. The total area is 148.81 km2 (57.46 sq mi) and shares a border with Ei, a town to its north.

Kagoshima Prefecture is a prefecture of Japan located on the island of Kyushu and the Ryukyu Islands. Kagoshima Prefecture has a population of 1,564,175 and has a geographic area of 9,187 km2. Kagoshima Prefecture borders Kumamoto Prefecture to the north and Miyazaki Prefecture to the northeast.