Naka-ku, Okayama
Naka-ku is one of four wards of Okayama, Okayama Prefecture, Japan. The ward has an area of and a population of 138,949. The population density is. The name means "Central Ward." The Shujitsu Junior College is located here
The wards of Okayama were established when Okayama became a city designated by government ordinance on April 1, 2009.