Ōoka, Nagano
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Ōoka (大岡村 Ōoka-mura?) was a village located in Sarashina District, Nagano, Japan. On January 1, 2005, the village of Ōoka merged into the city of Nagano, dissolving Sarashina District.
As of 2003, the village had an estimated population of 1,467 and a density of 31.99 persons per km². The total area was 45.86 km².