History
Sumiyoshi Station opened on 21 December 1978 as a stop on the Toei Shinjuku Line, beneath the intersection of Shin-Ōhashi-dōri and Yotsume-dōri in Kōtō. A connecting Tokyo Metro Hanzōmon Line station was added on 19 March 2003, built as a two-level structure with the deeper Oshiage-bound platform sitting 32.6 metres below ground — the second-deepest on the Hanzōmon Line. Its rail-level elevation of −31.0 m is the lowest point of any Tokyo subway station. The Hanzōmon facilities passed to Tokyo Metro on 1 April 2004 when Teito Rapid Transit Authority was privatised, PASMO use began on 18 March 2007, and platform departure melodies were introduced on the Hanzōmon platforms on 13 September 2018.
History summarized from Japanese & English Wikipedia · last reviewed 2026-05-18.
Notes
The Tokyo Metro platform's rail level is 31 metres below sea level — the deepest point, by elevation, in any Tokyo subway station.