Iizuka (飯塚市, Iizuka-shi) is a city in Fukuoka Prefecture, Japan. As of 29 February 2024[update], the city had an estimated population of 124,757 in 63833 households, and a population density of 580 persons per km².[1] The total area of the city is 213.96 km2 (82.61 sq mi). Iizuka is the central city of the Chikuho region located in the center of Fukuoka Prefecture, approximately 35 kilometers east of Fukuoka City and approximately 40 kilometers southwest of the center of Kitakyushu City. The Onga River, a first-class river, flows through the central part of the city, and the area forms an urban area. From the northwestern part of the city to the western and southwestern parts of the city, there are mountains ranging in height from 400 to 900 meters, including Mt. Mikoriyama (935.9 meters) and Mt. Toishi (828 meters). There are also several mountains in the eastern part of the city that are between 200 and 300 meters high, forming a small mountain range. Therefore, the central and northern parts of the city are a basin surrounded by mountains. Yagiyama Pass and Shokegoe on the western edge of the city, and Hiyomizu Pass on the southern edge of the city were difficult areas for transportation until roads were developed. Fukuoka Prefecture