Minami-sunamachi Station
T15 · Tozai Line · Koto
Minami-sunamachi Station (南砂町)
Building T15 meant building under a river. The Suzaki River, later filled in, ran along the line of the station, and the soft ground beneath its bed defeated ordinary methods: most of the box was sunk as a series of thirteen pneumatic caissons, each between 23.5 m and 26.5 m long, with cut-and-cover at one end and a 21.25 m open-cut section in the middle where an outfall culvert blocked the caissons. The station opened on 29 March 1969.
It has been on a curve and short of capacity ever since. The platform sits close to a tunnel mouth, near enough that the track is laid on ballast like a surface railway to hold the noise down. Rebuilding to add a second platform and a third track began in the 2020s: the first track switch on 11 and 12 May 2024 closed the line between Toyocho and Nishi-kasai for two days with replacement buses, and the new platform opened on 13 May 2024. The whole program is scheduled to finish in the 2031 financial year.
Finding Minami-sunamachi on the signs
Every line gives the station its own letter-and-number code. You never have to read the Japanese name to find the right platform.
Station numbers at Minami-sunamachi
Tokyo signposts every platform, exit and train door with a letter and a two-digit number. Matching the number is faster than reading the name — and it is what you will see on the map, in announcements and on the platform edge.
First and last trains at Minami-sunamachi
Departure times come from the operators’ own GTFS timetables (ODPT GTFS Toei-Train-GTFS (version 20261009, valid 2026-03-14..2027-03-12) + TokyoMetro-Train-GTFS (version 20261008, valid 2026-09-19..2027-03-12)). Japan publishes two subway timetables: 平日 weekdays and 土休日 Saturdays, Sundays and national holidays. There is no separate Sunday timetable, and the December 30 – January 3 period runs the holiday timetable.
How often do trains run?
| Line | Weekdays, busiest hour | Sat / Sun / holidays, busiest hour |
|---|---|---|
| TTozai | 25 trains/hour (about one every 2.4 min) | 12 trains/hour |
Departures in one direction during the hour with the most trains at this station, counted in the operators’ timetable.
Next stations from Minami-sunamachi
Scheduled running time between Minami-sunamachi and the stations either side of it.
| Line | Next station | Running time |
|---|---|---|
| TTozai | T16Nishi-kasai | 4 min |
| TTozai | T14Toyocho | 3 min |
Transfers and connections
Only the Tozai Line stops here, and no other railway serves this station, so there is nothing to transfer to inside the station.
Accessibility
| Line | Step-free by elevator | Accessible toilet | Escalator | Exits |
|---|---|---|---|---|
| TTozai | Yes | Yes | Yes | 3 |
- Tozai Line: Step-free elevator route street-gate-platform (official “1-route by elevator”). Operator page (checked Oct 20, 2026).
Taken from the operators’ own accessibility pages and nothing else. Tokyo Metro: the “1-route” (step-free street-gate-platform path by elevator, slope, stair lift or wheelchair escalator) is complete at all 180 stations; a separate list shows stations with an elevator-only 1-route.
What is near Minami-sunamachi Station?
Minami-sunamachi serves a reclaimed, low-lying part of Koto ward laid out with housing blocks and warehouses rather than shops. Shinsuna Ayumi Park is about 70 m from the exits — it opened in 2002 in front of exit 3 and holds a monument built from a withdrawn Eidan 5000 series car — and Minamisuna-sanchome Park is roughly 150 m away. The Juntendo Koto Medical Center for the Elderly, some 370 m out, is the largest institution nearby.
| Place | Distance (straight line) | On foot, estimated |
|---|---|---|
| Shinsuna Ayumi Park 新砂あゆみ公園 | 70 m | about 1 min |
| Minamisuna-sanchome Park 南砂三丁目公園 | 150 m | about 2 min |
| 公社南砂七丁目児童公園 | 200 m | about 3 min |
| 日曹橋公園 | 380 m | about 6 min |
| Juntendo Koto Medical Center for the Elderly 順天堂東京江東高齢者医療センター | 370 m | about 6 min |
Places from OpenStreetMap within 400 m of the station. The walking time is an estimate (straight line plus 30 %, 80 m a minute), not a measured route. © OpenStreetMap contributors, ODbL.
Frequently asked questions
Because one island platform could no longer cope. The 2022 ridership put the station 61st of the 130 on the Tokyo Metro network, so a second platform and a third track are being added; the new platform opened on 13 May 2024 and the finished station will have two island platforms, with work due to end in the 2031 financial year.
Shinsuna Ayumi Park, which opened on 1 April 2002 in front of exit 3, contains a monument made from a withdrawn Eidan 5000 series car — the type that once worked this line under the Teito Rapid Transit Authority, the subway operator Tokyo Metro replaced in 2004.