Ichinoseki is a city located in the Iwate Prefecture within the Tōhoku region of northern Japan. It serves as a significant urban center in the prefecture, ranking as the second largest city by population after Morioka.
As of May 1, 2020, the city had a total area of 1,256.42 square kilometers (485.11 sq mi) and a population of 114,476 residing in 46,375 households. The population density of the city is recorded at 91 persons per square kilometer.