Naoiri (直入郡, Naoiri-gun) was a district located in Ōita Prefecture, Japan.
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As of 2003, the district had an estimated population of 10,956 and the density of 39.58 persons per km². The total area was 276.84 km².
Former towns and villages
District Timeline
References
Naoiri District, Ōita Wikipedia(Text) CC BY-SA