Onarimon Station
I06 · Mita Line · Minato
Onarimon Station (御成門)
The gate that named this station was the Tokugawa family’s private entrance to the grounds of Zojo-ji, standing at what is now the Onarimon crossing. It was moved in the Meiji period to the edge of the site occupied today by the Tokyo Prince Hotel, survived both earthquake and war, and is still standing. Planners had the name ready long before the trains: a 1919 city transport study already listed an Onarimon station on a proposed Meguro–Senju line.
What was then Toei Line 6 reached the site on 27 November 1973, and the line took the Mita Line name on 1 July 1978. The platform is a single island on the second basement level with blue track walls, and older name boards on it still carry the secondary title Tokyo Tower-mae. A siding beyond the platform is used for stabling, and trains occasionally start their run at I06 rather than passing through. Toei’s 2024 count put the station at 43,230 passengers a day.
Finding Onarimon 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 Onarimon
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 Onarimon
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 |
|---|---|---|
| IMita | 19 trains/hour (about one every 3.2 min) | 11 trains/hour |
Departures in one direction during the hour with the most trains at this station, counted in the operators’ timetable.
Next stations from Onarimon
Scheduled running time between Onarimon and the stations either side of it.
| Line | Next station | Running time |
|---|---|---|
| IMita | I05Shibakoen | 1 min |
| IMita | I07Uchisaiwaicho | 1 min |
Transfers and connections
Only the Mita 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 |
|---|---|---|---|---|
| IMita | Yes | Yes | Yes | 7 |
- Mita Line: Toei: step-free “1-route” secured; 2 elevator(s) on this line. Elevator exit(s): A3b, A6. Operator page (checked Oct 20, 2026).
Taken from the operators’ own accessibility pages and nothing else. Toei: every station has elevators and a street-gate-platform “1-route” is secured.
What is near Onarimon Station?
Shiba Park begins about 130 m from the exits, and Tokyo Tower is among the places the station serves, as the old signs advertise. The Onarimon gate itself is roughly 190 m away, Minato City Hall about 300 m, and the Tokyo Prince Hotel and the Shiba Park Hotel stand on either side of the park. Two universities keep daytime traffic steady, the Jikei University School of Medicine and Keio’s economics faculty, both around 250 m, and Shibadaijingu shrine is a little beyond them.
| Place | Distance (straight line) | On foot, estimated |
|---|---|---|
| Shiba Park 芝公園 | 130 m | about 2 min |
| Shibadaijingu 芝大神宮 | 380 m | about 6 min |
| 青松寺 | 350 m | about 6 min |
| 常照院 | 360 m | about 6 min |
| 鹽竈神社 | 390 m | about 6 min |
| 東京慈恵会医科大学（医学部） | 240 m | about 4 min |
| 慶應義塾大学(経済学部) | 250 m | about 4 min |
| グラント松 | 400 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
It is the name of a gate: the entrance built for the Tokugawa shoguns at the northern edge of Zojo-ji’s grounds. The gate was moved in the Meiji period to the edge of what is now the Tokyo Prince Hotel site and still stands, and the crossing above the station keeps the name.
Older station name boards on the platform carry Tokyo Tower-mae as a secondary name, and both versions are still in use. The tower is among the places Onarimon serves, and the subtitle survives from a time when that connection was advertised more prominently than it is now.