Kaizuka is a city located in Osaka Prefecture, Japan. As of 1 January 2022, the city had an estimated population of 83,995 in 37,778 houseā¦Kaizuka is a city located in Osaka Prefecture, Japan. As of 1 January 2022, the city had an estimated population of 83,995 in 37,778 households and a population density of 1900 persons per km². The total area of the city is 43.93 square kilometres.