Tōkai(東海村,Tōkai-mura) is a village located in Naka District, Ibaraki Prefecture, in the northern Kantō region of Japan. As of September 2015, the village had an estimated population of 37,885 and a population density of 997 persons per km². Its total area was 37.98 km². The Japan Atomic Energy Agency along with other organizations currently operate a number of nuclear technology research facilities in the town. In particular, Tōkai Nuclear Power Plant is located in Tōkai.