Hitoyoshi is a city in Kumamoto Prefecture, Japan. As of 31 August 2024, the city had an estimated population of 29,842 in 15292 households, …Hitoyoshi is a city in Kumamoto Prefecture, Japan. As of 31 August 2024, the city had an estimated population of 29,842 in 15292 households, and a population density of 140 persons per km². The total area of the city is 210.55 km².