Itoshima is a city located in western Fukuoka Prefecture, Japan. As of 31 March 2024, the city had an estimated population of 103,655 in 46,19…Itoshima is a city located in western Fukuoka Prefecture, Japan. As of 31 March 2024, the city had an estimated population of 103,655 in 46,192 households, and a population density of 480 persons per km². The total area of the city is 215.69 km².