Jōyō is a city located in Kyoto Prefecture, Kansai, Japan. As of 1 September 2023, the city has an estimated population of 72,869 in 3…Jōyō is a city located in Kyoto Prefecture, Kansai, Japan. As of 1 September 2023, the city has an estimated population of 72,869 in 30720 households and a population density of 2200 persons per km². The total area of the city is 32.71 square kilometres.