Tsuyama is a city in Okayama Prefecture, Japan. As of 1 February 2023, the city had an estimated population of 97,507 in 45653 households …Tsuyama is a city in Okayama Prefecture, Japan. As of 1 February 2023, the city had an estimated population of 97,507 in 45653 households and a population density of 190 persons per km². The total area of the city is 506.33 square kilometres.