Nantan is a city located in Kyoto Prefecture, Japan. As of 1 May 2022, the city had an estimated population of 30,744 in 14406 households and …Nantan is a city located in Kyoto Prefecture, Japan. As of 1 May 2022, the city had an estimated population of 30,744 in 14406 households and a population density of 50 persons per km². The total area of the city is 616.40 square kilometres.