Tomakomai (苫小牧市, Tomakomai-shi) is a city and port in Iburi Subprefecture, Hokkaido, Japan. It is the largest city in the Iburi Subprefecture, and the fourth largest city in Hokkaido. As of 31 July 2023, it had an estimated population of 167,372, with 83,836 households, and a population density of 298 persons per km² (770 persons per mi²). The total area is 561.57 km2 (216.82 sq mi). | ||||||