text: The  is a major commuter line operated by the private railway operator Tokyu Corporation and connecting south-western suburbs of Tokyo and neighbouring Kanagawa Prefecture, with its western terminus of , to a major railway junction of western downtown Tokyo, . At Shibuya, nearly all the trains continue on the Tokyo Metro Hanzomon Line.
  The line's color on maps and station guides is green, and stations carry the prefix "DT" followed by a number.
  History
  Prewar predecessors
  On March 6, 1907, the  opened the first section of an interurban line between Shibuya and what is now , using  gauge. The line was called the  and is not to be confused with today's Tokyu Tamagawa Line (東急多摩川線). The branch from Sangen-Jaya Station opened on January 18, 1925.