List of Provinces of Japan> Tōsandō> Mutsu Province> Sannohe District Japan> Tōhoku region> Aomori Prefecture> Sannohe DistrictSannohe District is a district located in Aomori Prefecture, Japan. It occupies the southeast corner of the prefecture, bordering Iwate Prefecture. As of June 1, 2019, the district has an estimated population of 63,205 and a density of 65.2 persons per km2. The total area was 969.34 km2.