The Tobu Tojo Line (東武東上線, Tōbu Tōjō-sen) is a 75.0 km suburban railway line in Japan which runs from Ikebukuro Station in Toshima, Tokyo to Yorii Station in Yorii, Saitama, operated by the private railway operator Tobu Railway. Its official name is the Tobu Tojo Main Line (東武東上本線, Tōbu Tōjō Honsen), but it is referred to as Tobu Tojo Line (東武東上線, Tōbu Tōjō Sen) on Tobu signage and publicity information. The name of the line comes from the original plan to construct a line linking Tokyo (東京) with Jōshū (上州) (an old province now Gunma Prefecture).