Kiryū is a city located in Gunma Prefecture, Japan. As of 31 July 2020, the city had an estimated population of 108,991 in 49,745 households, a…Kiryū is a city located in Gunma Prefecture, Japan. As of 31 July 2020, the city had an estimated population of 108,991 in 49,745 households, and a population density of 400 persons per km². The total area of the city is 274.45 square kilometres.