🇯🇵 Rumoi, Hokkaido

Rumoi is a city in Rumoi Subprefecture, Hokkaido, Japan. As of 31 January 2025, the city had an estimated population of 18,132 in 10519 households, and a population density of 61 people per km2. The total area of the city is 297.81 km2 (114.99 sq mi). There are several theories about the origin of the name, which comes from the Ainu word for the Rumoi River. The word "rur-mo-ot-pe," means "a river with calm, constant tides," or "a river with deep tides," and this theory has been adopted by the city.