Aisai is a city located in Aichi Prefecture, Japan. As of 1 October 2019, the city had an estimated population of 61,320 in 23,451 households, and a population density of 919 persons per km2. The total area of the city is 66.70 square kilometres (25.75 sq mi). Aisai is a member of the World Health Organization’s Alliance for Healthy Cities (AFHC).