Nishi-kasai Station (西葛西駅, Nishi-kasai-eki) is a railway station on the Tokyo Metro Tozai Line in Edogawa, Tokyo, Japan, operated by the Tokyo subway operator Tokyo Metro.

Nishi-Kasai Station is served by the Tokyo Metro Tozai Line.

The station has two elevated side platforms.

Nishi-kasai Station opened on 1 October 1979.

The station facilities were inherited by Tokyo Metro after the privatization of the Teito Rapid Transit Authority (TRTA) in 2004.