Hachinohe (八戸市 Hachinohe-shi?) is a city in southeastern Aomori Prefecture in the Tōhoku region of Japan. As of September 2015, the city had an estimated population of 231,337 and a population density of 757 persons per km2 (1,997 persons per sq. mi.). This makes it the second biggest city of Aomori prefecture. The total area was 305.43 square kilometres (117.93 sq mi).