Kasugai is a city in Aichi Prefecture, Japan. As of 1 October 2019, the city had an estimated population of 306,764, and a population density of 3,306 persons per km2. The total area of the city is 92.78 square kilometres. The city is sometimes called Owarikasugai to avoid confusion with other municipality of the same name, including Kasugai in Yamanashi Prefecture.