The Sendai Subway(仙台市地下鉄,Sendai-shi Chikatetsu?) is a subway system in Sendai, Japan. It is operated by the Sendai City Transportation Bureau. The Subway consists of a single line, the Nanboku Line, which opened in 1987. Construction of a second line, the Tōzai Line, began in 2004 with a planned opening date of 2015.