Nishi-Ōi

Weekday departures: 424/day · Sat & holiday departures: 160/day

First / last train (weekday): 4:35 / 24:22

Busiest hour: 9:00–10:00 (33)

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0:00 ─ 23:00

Counts are departures in the timetable data shown on our live map.

• Tōkaidō Main Line: Shinagawa ⇄ Musashi-Kosugi

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.

The station sits literally beneath the Tōkaidō Shinkansen — its two elevated side platforms tuck under the viaduct carrying high-speed trains over Shinagawa.