Saitama (さいたま市 Saitama-shi?) 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 - 30 kilometres north of central Tokyo, many of its residents commute into Tokyo.
The city is located 20 to 30 km north of central Tokyo, roughly at the center of the Kantō Plain. Within Saitama Prefecture, the location corresponds to the southeastern portion bordered by Ageo City, Hasuda City, and Shiraoka Town to the north; Asaka City, Kawaguchi City, Toda City, and Warabi City to the south; Koshigaya City to the east; Kasukabe City to the northeast; and Kawagoe City, Shiki City, and Fujimi City to the west.
Situated within the Kantō Plain, the city is topographically comprised by lowlands and plateaus, mostly falling below 20 m above sea level, with no mountain ranges or hills within the city boundaries. The western portion of the city lies on the lowland created by the Arakawa River along with those created by small rivers such as the Moto-Arakawa River, Shiba River, and Ayase River. The rest of the area mostly resides on the Ōmiya Plateau lying in the north-south direction. Dispersed in this region, major rivers flow southward, almost paralleling to one another.