Konan is a city located in southern Shiga Prefecture, Japan. As of 1 October 2021, the city had an estimated population of 54,607 in 2430…Konan is a city located in southern Shiga Prefecture, Japan. As of 1 October 2021, the city had an estimated population of 54,607 in 24305 households and a population density of 780 persons per km². The total area of the city is 70.4 square kilometres.