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'' was a district located in Ōita Prefecture, Japan.
As of January 1, 2005 the district had 6 towns and 2 villages.

★ Asaji

★ Chitose

★ Inukai

★ Kiyokawa

★ Mie

★ Notsu

★ Ogata

★ Ōno
On January 1, 2005, the town of Notsu dissolved from the district when the town merged with the city of Usuki to form the new city of Usuki. The remaining 5 towns and 2 villages merged on March 31, 2005 to form the new city of Bungo-ōno and Ōno District dissolved

Contents

Timeline

Timeline

★ February 1, 1956

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★ Parts of the town of Asaji merged into the town of Ogata.

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★ Parts of the town of Asaji merged into the town of Naoiri in Naoiri District.

★ October 1, 1956 -Parts of the town of Notsu merged into the town of Mie.

★ April 1, 1957

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★ Parts of the village of Kiyokawa merged into the town of Mie.

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★ Parts of the village of Kiyokawa merged into the town of Ogata.

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★ Parts of the town of Inukai merged into the town of Notsu.

★ January 1, 2005 - The town of Notsu merged with the city of Usuki to form the city of Usuki. (5 towns, 2 villages)

★ March 31, 2005 - The towns of Mie, Asaji, Inukai, Ogata, Ōno, and the villages of Kiyokawa and Chitose merged to form the city of Bungo-ōno. Ōno District dissolved as a result.