is a city located in Ōita Prefecture, Japan. The city was founded on April 1, 1951. As of March 31, 2017, the city has an estimated population of 18,341, with 8,384 households and a population density of 230 persons per km2. The total area is 79.48 km2. Industry West of the city is the Todaka Mine one the biggest limestone quarries in Japan. The limestone is used in the Tsukumi cement plant owned by the Taiheiyo Cement Corporation. Notable people from Tsukumi Yasuei Yakushiji, former professional boxer References External links Tsukumi City official website Cities in Ōita Prefecture Port settlements in Japan Populated coastal places in Japan