WEBŌkawa, Fukuoka. / 33.20667°N 130.38389°E / 33.20667; 130.38389. Ōkawa (大川市, Ōkawa-shi) is a city located in Fukuoka Prefecture, Japan. [1] [2] As of 1 February 2024, the city had an estimated population of 31,605 in 13984 households, and a population density of 940 persons per km². [3] The total area of the city is 33.62 km ...