April 1, 1889 — Due to the town and village status enforcement, the villages of Kitatane, Nakatane, and Minamitane were formed within Kumage District. (3 towns)
March 29, 1896 — Absorbed Gomu District. (5 villages)
April 1, 1926 — The village of Kitatane gained town status and renamed to become the town of Nishinoomote. (1 town, 4 villages)
November 10, 1940 — The village of Nakatane gained town status. (2 towns, 3 villages)
October 15, 1956 — The village of Minamitane gained town status. (3 towns, 2 villages)
April 1, 1958 — The village of Kamiyaku gained town status. (4 towns, 1 village)
October 1, 1958 — The town of Nishinoomote gained city status. (3 towns, 1 village)
April 1, 1959 — The village of Shimoyaku gained town status and renamed to become the town of Yaku. (4 towns)
October 1, 2007 — The towns of Kamiyaku and Yaku merged to form the town of Yakushima. (3 towns)
