Fukutsu is a city located in Fukuoka Prefecture, Japan. As of 29 February 2024, the city had an estimated population of 68,834 in 31114 house…Fukutsu is a city located in Fukuoka Prefecture, Japan. As of 29 February 2024, the city had an estimated population of 68,834 in 31114 households, and a population density of 1300 persons per km². The total area of the city is 52.76 km².