Kodaira redirects here. For the mathematician, see Kunihiko Kodaira. Kodaira (, Kodaira-shi) is a city located in the western region of Tokyo, Japan. The city has an estimated population of 180,049with 82,179households and a population density of 8,800.05persons per km² as of July 1, 2011. The total area is 20.46Square kilometers. The city was founded on October 1, 1962.