Ichikawa is a city in western Chiba Prefecture, Japan. As of 31 August 2021, the city had an estimated population of 491,716 in 251,142 households and a population density of 8559 persons per km2. The total area of the city is 57.45 square kilometres. 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.