WEBIwate Prefecture (岩手県, Iwate-ken) is a prefecture of Japan located in the Tōhoku region of Honshu. [2] It is the second-largest Japanese prefecture at 15,275 square kilometres (5,898 sq mi), with a population of 1,165,886 (as of July 1, 2023). Iwate Prefecture borders Aomori Prefecture to the north, Akita Prefecture to the west, and ...