Oku (邑久郡, Oku-gun) was a district located in Okayama Prefecture, Japan.
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As of 2003, the district had an estimated population of 39,365 and a density of 313.64 persons per km². The total area was 125.51 km².
Towns and villages
Merger
References
Oku District, Okayama Wikipedia(Text) CC BY-SA