| Suō-Ōshima (周防大島町, Suō-Ōshima-chō) is a town and an island located in Ōshima District, Yamaguchi Prefecture, Japan.
Suō-Ōshima was formed on October 1, 2004 from the merger of the former towns of Ōshima, Kuka, Tachibana and Tōwa, all from towns of Ōshima District.
As of April 1, 2017, the town has an estimated population of 17,030. The total area is 138.17 km².
Suo-Oshima has established a sister island relationship with the County of Kauai, Hawaii in 1963. A 50th Anniversary commemoration was held on Kauai in October 2013. Current Mayors Takumi Shiiki (Suo-Oshima) and Bernard P. Carvalho, Jr. (Kauai) signed a Reaffirmation of Friendship agreement. |
