Editing Den-en-toshi Line (section)

===Tama Den-En-Toshi Plan===
In 1953, Tokyu Group president [[Keita Gotō (industrialist)|Keita Gotō]] unveiled a "[[new town]]" planning scheme called the ''South-Western Area Development Plan''. He envisioned new railway line and freeway and large, clean houses for commuters working in Tokyo.<ref name="TokyuHistory">{{Cite web|url=https://www.tokyu.co.jp/company/outline/history.html|title=年譜 ｜東急電鉄|website=www.tokyu.co.jp|access-date=2020-03-18}}</ref> The railway line would become the Tama Den-En-Toshi Line and the expressway the [[Tōmei Expressway]]. The parts of the new line completely overlaps the Tamagawa Line and the project is known as the Shin-Tamagawa Line or "New Tamagawa Line" which runs in an underground alignment under the old interurban line. The Tamagawa Line was closed in 1969 in anticipation for the opening of the Shin-Tamagawa Line, with the remaining branch line of the Tamagawa Electric Railway split off into the present [[Tokyu Setagaya Line]]. The underground Shin-Tamagawa Line opened a few years later in 1977, completely replacing the closed interurban line. Upon opening it was treated as a separate line from the Ōimachi Line connecting to said line at Futako-Tamagawa.{{citation needed|date=March 2020}}