It primarily serves commuters from Saitama Prefecture and other residential areas northwest of the city center.

However, on weekends or holidays, S-Train (Seibu) services stop here on the Tokyo Metro Fukutoshin Line platforms for alighting passengers only.

(Despite their names, "Seibu" (西武) starts with the kanji for "west" (西), but its platforms are on the eastern side of the station, while "Tōbu" (東武) starts with the character for "east" (東), but its platforms are on the western side of the station.)

[2] The Tobu station has three terminating tracks served by platforms 1 to 5, arranged as shown in the diagram on the right.

[8] The station facilities of the Marunouchi and Yurakucho Lines were inherited by Tokyo Metro after the privatization of the Teito Rapid Transit Authority (TRTA) in 2004.

[9] In June 2008, the Tobu station ticket barriers were color-coded into three "zones": North, Central, and South.

[10][11] On 1 March 2024, the departure melody on both Yamanote Line platforms was changed to the theme song of Bic Camera.

The figures below are the official number of passengers entering and exiting each day released by each train operator.

The daily passenger figures for the JR East, Seibu, Tobu, and Tokyo Metro station after fiscal 2000 are as shown below.