Rumoi Subprefecture

is a subprefecture of Hokkaido Prefecture, Japan. As of 2011, it had a population of 52,627 and an area of . The population density of the subprefecture, 13 people per km2, is very low compared to the rest of Japan. The population of Rumoi Subprefecture represents 0.96% of the overall population of Hokkaido. Geography Rumoi Subprefecture stretches broadly across the coast of the Sea of Japan in northwestern Hokkaido. Municipalities Mergers