History
Nishi-kasai Station opened on 1 October 1979 on the Tokyo Metro Tozai Line in Edogawa Ward, four years after construction had begun in November 1977. The site had been reserved when the Tozai Line was first extended through the area in 1969, in anticipation of the Kasai-oki reclamation and the Seishin/Rinkai residential development that followed. The elevated station ended up serving roughly three times its forecast ridership; a major rebuild between 1999 and 2000 widened the platform from 6.25 m to 8.5 m and added underground bicycle parking. The Teito Rapid Transit Authority's facilities passed to Tokyo Metro upon privatisation on 1 April 2004. Platform-edge doors entered service on 16 April 2022.
History summarized from Japanese & English Wikipedia · last reviewed 2026-05-18.
Notes
Nishi-kasai to the next station Minami-sunamachi is 2.7 km, the longest inter-station distance anywhere on Tokyo Metro's network.