Nagaoka District, Kōchi
Nagaoka (長岡郡 Nagaoka-gun?) is a district located in Kōchi Prefecture, Japan.
As of 2003, the district has an estimated population of 10,393 and a density of 23.14 persons per km². The total area is 449.15 km².
Coordinates: 33°47′31″N 133°40′16″E / 33.792°N 133.671°E
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