is a city located in Fukuoka Prefecture, Japan. The city was founded on April 1, 1954. As of January 31, 2012, the city has an estimated population of 37,579, with 13,102 households and a population density of 1,117.42 persons per km2. The total area is 33.63 km2. Geography Ōkawa is located in southern Fukuoka Prefecture next to the border with Saga Prefecture. The Chikugo River flows from northeast to southwest through the city, which is relatively flat. At the centre of Ōkawa, the Hanamune River flows into the Chikugo River as a tributary. Neighboring municipalities Fukuoka Prefecture Kurume Ōki Yanagawa Saga Prefecture Saga Kanzaki Sister cities Pordenone, Italy References External links Ōkawa City official website Cities in Fukuoka Prefecture