[2] The station opened on 21 December 1978, initially served by the Toei Shinjuku Line only.

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

[4] Sumiyoshi Station is located about 15 minutes' walk away from Kinshichō Station, one of Kōtō, Tokyo's largest shopping areas and also lies in close proximity to Sarueonshi Park.

This branch line, expected to be in service in the mid-2030s, will connect Sumiyoshi Station with the region south of it.

A branch line from Toyosu Station has been planned since the early 1980s, heading north via Kameari Station (on the Jōban Line) to Noda in northwest Chiba Prefecture.