History
Higashi-kōenji Station opened on 18 September 1964 just before the Tokyo Olympics, as a Teito Rapid Transit Authority addition to the Ogikubo Line beneath Ōme-kaidō in Wada 3-chōme, Suginami. The line had originally bypassed this stretch when the Shin-Nakano–Minami-Asagaya section opened on 1 November 1961, but the 1963 abolition of Toden tram line 14 (Suginami) prompted local residents to petition for an infill station, and construction began on 20 January 1964 by removing the tunnel side-walls to insert a 120-metre opposed platform under 20 km/h shielded slow-running. The Ogikubo Line was renamed the Marunouchi Line on 1 April 1972, and Tokyo Metro inherited the station at the 2004 TRTA privatisation.
History summarized from Japanese & English Wikipedia · last reviewed 2026-05-18.
Notes
The underground transfer passage between the two side platforms originally lay outside the ticket gates because a local Christian-church pastor petitioned for a safe way to cross Ōme-kaidō without a surface footbridge; once a real overpass was built, the passage finally moved inside the paid area on 19 June 2012.