Okayama is equivalent to several cities in China.

Okayama is equivalent to a third-tier city in China.

According to the urban development standards and economic development level of Japan and China, Okayama can be classified as a third-tier city. Okayama is a small city in Japan, with a relatively small population and relatively small buildings and roads. Compared with domestic third-tier cities, Okayama's economic development level and city scale belong to similar categories.