Kōsa is a town located in Kamimashiki District, Kumamoto Prefecture, Japan. As of 31 July 2024, the town had an estimated population of 10,004 in 4441 households, and a population density of 24 persons per km. The total area of the town is 57.93 km.
Country: Japan
Region: Kyushu
Prefecture: Kumamoto
District: Kamimashiki
City hall address: 719-4 Toyonai, Kosa-cho, Kamimashiki-gun, Kumamoto-ken 861-4696