Miyoshi is a city located in central Aichi Prefecture, Japan. As of 1 October 2019, the city had an estimated population of 62,782 in 24,260 house…Miyoshi is a city located in central Aichi Prefecture, Japan. As of 1 October 2019, the city had an estimated population of 62,782 in 24,260 households, and a population density of 1,950 persons per km². The total area of the city was 32.19 square kilometres.