Ne Castle is a Muromachi period Motte-and-bailey-style Japanese castle located in what is now the city of Hachinohe, Aomori Prefecture, in the Tōhoku region of far northern Japan. It has been protected by the central government as a National Historic Site since 1941. It was extensively reconstructed in 1994.

Hachinohe is a city located in Aomori Prefecture, Japan. As of 1 August 2023, the city had an estimated population of 216,416 in 110,195 households, and a population density of 708 persons per km2, making it Aomori Prefecture's second largest city by population. The city has a total area of 305.56 square kilometres (117.98 sq mi).