Iwamizawa is a city in Sorachi Subprefecture, Hokkaido, Japan. It is the capital of Sorachi Subprefecture. As of July 31, 2023, the city had an estimated population of 75,949 and the density of 158 persons per km2.Map Directions Satellite Photo Mapcity.iwamizawa.hokkaido.jp Wikivoyage ...