is a subway station on the Tokyo Metro Fukutoshin Line, in Shinjuku, Tokyo, Japan, operated by the Tokyo subway operator Tokyo Metro. Its station number is F-11. The station opened on June 14, 2008. This station is directly connected to Nishiwaseda Campus of Waseda University in Shinjuku, Tokyo.
Nishi-waseda Station is served by the Tokyo Metro Fukutoshin Line between and , with many direct through-running services to and from the Seibu Ikebukuro Line and Tobu Tojo Line in the north, and the Tokyu Toyoko Line and Minatomirai Line in the south. The station lies 14.6 km from Wakoshi. It is also relatively close to Takadanobaba Station on the Tokyo Metro Tozai Line (located 550 meters to the northwest), although it is not officially recognized as a transfer station and there is no transfer corridor between the two stations.
The station has one underground island platform located on the third basement ("B3F") level, serving two tracks.
The station opened on 14 June 2008 with the opening of the Fukutoshin Line from Ikebukuro to Shibuya.
In fiscal 2013, the station was the 105th-busiest on the Tokyo Metro network with an average of 32,380 passengers daily. The passenger statistics for previous years are as shown below.