The city is sometimes called Owarikasugai to avoid confusion with other municipality of the same name, including Kasugai (now part of Fuefuki) in Yamanashi Prefecture.

Kasugai is located in northwest Aichi Prefecture, north of the Nagoya metropolis, in the northern Nōbi Plain.

[2] Per Japanese census data,[3] the population of Kasugai has increased rapidly over the past 70 years with the 1960s being the fastest growing decade.

Kasugai has a mayor-council form of government with a directly elected mayor and a unicameral city legislature of 32 members.

In terms of national politics, the city is part of Aichi 6th district of the lower house of the Diet of Japan.