Nakauonuma District, Niigata
From Wikipedia, the free encyclopedia

* yellow – areas formerly within the district borders during the early Meiji period
* green – current borders
- Tsunan-mura
Nakauonuma (中魚沼郡, Nakauonuma-gun) is a district located in Niigata Prefecture, Japan.
As of July 1, 2019, the district has an estimated population of 9,218 with a density of 54.2 persons per km2. The total area is 170.21 km2.