Ooka, Nagano
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Oōka (大岡村; -mura) is a village located in Sarashina District, Nagano, Japan.
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.
On January 1, 2005, the village of Ooka merged into the city of Nagano, dissolving Sarashina District.