History
Minami-Shinjuku Station opened on 1 April 1927 with the launch of the Odakyū line, originally as Sendagaya-Shinden Station and named after the local district. It was renamed Odakyū-Honsha-mae on 1 July 1937 in reference to the adjacent Odakyū corporate headquarters, and took its current name on 1 May 1942 when wartime mergers brought Odakyū into Tōkyū. Air raids in May 1945 destroyed Odakyū's head office and forced trains to terminate here for several days. On 21 December 1973 the platform was shifted about 150 m towards Sangūbashi during the rebuild of Odakyū's nearby Shinjuku terminus, and platform extension work for ten-car trains was completed in February 2012.
History summarized from Japanese & English Wikipedia · last reviewed 2026-06-09.
Where the English and Japanese sources differ, this account follows the Japanese source.
Notes
Despite "Shinjuku" in its name, the station is in Shibuya ward and is the least-used of any major-private-railway stop within Tokyo's 23 wards.