Ichikawa is a city in western Chiba Prefecture, Japan. As of 31 January 2024, the city had an estimated population of 492,749 in 256,229 households and a population density of 8577 persons per km2. The total area of the city is 57.45 square kilometres (22.18 sq mi). The city has a concentration of the wide-area traffic network that connects the center of Tokyo with many areas of Chiba Prefecture. Major rail routes and roads pass through the city.

Chiba Prefecture is a prefecture of Japan located in the Kantō region of Honshu. Chiba Prefecture has a population of 6,278,060 and has a geographic area of 5,157 km2 (1,991 sq mi). Chiba Prefecture borders Ibaraki Prefecture to the north, Saitama Prefecture to the northwest, and Tokyo to the west.