Ichinoseki(一関市,Ichinoseki-shi) is a city located in Iwate Prefecture, in the Tohoku region of northern Japan. As of September 1, 2015, the city had a population of 120,490 and a population density of 95.9 persons per km. It is currently the second largest city by population in the prefecture, after Morioka. The total area was 1,256.42 square kilometres (485.11sqmi).