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 km<sup>2</sup>. The total area is 449.15 km<sup>2</sup>.
Towns and villages
- Motoyama
- Ōtoyo
Nagaoka District, Kōchi
66 words updated Jun 17, 2026, 8:14 AM