On January 1, 2005, the town of
Notsu was merged into the expanded city of
Usuki.
On March 31, 2005, the towns of
Asaji,
Inukai,
Mie,
Ogata and
Ōno, and the villages of
Chitose and
Kiyokawa were merged to create the city of
Bungo-ōno. Therefore, Ōno District was dissolved as a result of this merger.
Timeline
February 1, 1956:
Parts of the town of Asaji was merged into the town of Ogata.
October 1, 1956 - Parts of the town of Notsu was merged into the town of Mie.
April 1, 1957:
Parts of the village of Kiyokawa was merged into the town of Mie.
Parts of the village of Kiyokawa was merged into the town of Ogata.
Parts of the town of Inukai was merged into the town of Notsu.
January 1, 2005 - The town of Notsu was merged into the expanded city of Usuki.[1] (5 towns, 2 villages)
March 31, 2005 - The towns of Asaji, Inukai, Mie, Ogata and Ōno, and the villages of Chitose and Kiyokawa were merged to create the city of
Bungo-Ōno.[1] Ōno District was dissolved as a result of this merger.