It is 18.5 km (11.5 mi) from the eastern terminus of the Line at Ikebukuro, and also forms the starting point of the 3.2 km (2.0 mi) branch of the Marunouchi Line to Honancho.

The Tokyo Metro station has two island platforms serving three tracks on the second basement (B2F) level.

During the off-peak, platform 2 is used by three-car branch line trains shuttling between Nakano-Sakue and Honancho.

The Toei station has one island platform serving two tracks on the fourth basement (B4F) level.

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