Saitama is the capital and the most populous city of Saitama Prefecture in Japan, situated in the south-east of the prefecture. Its area incorporates the former cities of Urawa, Ōmiya, Yono and Iwatsuki. It is a city designated by government ordinance. Being in the Greater Tokyo Area and lying 15 to 30 kilometres north of central Tokyo, many of its residents commute into Tokyo. As of 1 February 2016, the city had an estimated population of 1,226,656 and a population density of 5830 persons per km². Its total area was 217.43 square kilometres (83.95 sq mi).