History
Nishi-Ōi Station opened on 2 April 1986, decades after the freight-only Hinkaku Line through Shinagawa Ward had been laid in 1929. The decade-long fight over the station — Japanese National Railways first proposed converting the freight line to passenger use in 1969, residents and the ward council pushed back on the cost-sharing scheme, and a 1980 court even temporarily blocked Shinagawa Ward's contribution — was eventually settled with third-sector funding from 1984. JR East inherited the station with privatisation on 1 April 1987. Shōnan-Shinjuku Line services began stopping on 1 December 2001, and elevated side platforms now sit directly beneath the Tōkaidō Shinkansen viaduct above.
History summarized from Japanese & English Wikipedia · last reviewed 2026-05-18.
Notes
The station sits literally beneath the Tōkaidō Shinkansen — its two elevated side platforms tuck under the viaduct carrying high-speed trains over Shinagawa.