Tsuyama is a city in Okayama Prefecture, Japan. In February 2023, the city had an estimated population of 97,507 in 45,653 households an…Tsuyama is a city in Okayama Prefecture, Japan. In February 2023, the city had an estimated population of 97,507 in 45,653 households and a population density of 190 persons per km². The total area of the city is 506.33 square kilometres.