The Saitama Rapid Railway Line (埼玉高速鉄道線 Saitama Kōsoku Tetsudō sen) is a commuter railway line in Japan operated by the third sector operating company Saitama Railway Corporation. Funded by Saitama Prefecture, local municipal governments, and Tokyo Metro, it forms a continuation of the Tokyo Metro Namboku Line, starting at Akabane-Iwabuchi Station in Tokyo and ending at Urawa-Misono Station in Saitama. It was completed on March 28, 2001, ahead of the 2002 FIFA World Cup, which held several matches at the Saitama Stadium close to Urawa-Misono Station. Except for the Urawa-Misono Station, the rest of the line is underground.