KUDOCHI onsen Roppongi is a private sauna in Roppongi, Minato, Tokyo, open 24 hours. Each of its three cave-themed rooms has its own hot-spring bath (the spring water changes with the season), a sauna with self-service löyly and a chilled cold plunge. Rooms take up to 6 or 8 guests, and mixed-gender groups are allowed. The details below were checked against the official website (checked: 2026-10-07).
- ✅ Couples / mixed-gender: OK (mixed groups wear swimwear, also in the sauna room; rental ¥500 per item) official source
- 👥 Capacity: Altamira up to 6 guests, SonDoong and Cenote up to 8 official source
Prices
| Plan or room | Guests | Time | Price |
|---|---|---|---|
| Altamira | 6 | 120 min | ¥35,000 |
| Altamira | 6 | Night 5 hours | ¥49,000 |
| SonDoong | 8 | 120 min | ¥39,000 |
| SonDoong | 8 | Night 5 hours | ¥55,000 |
| Cenote | 8 | 120 min | ¥39,000 |
| Cenote | 8 | Night 5 hours | ¥55,000 |
This is a separate venue from KUDOCHI sauna Roppongi, with different prices. Prices are per room, up to the room capacity.
Prices include tax (official commerce disclosure). Reservations only: register on the official booking site, choose a date and room, and pay by credit card in advance; walk-ins are not accepted. You can cancel or change free of charge up to 24 hours before your start time; after that you cannot cancel, and no-shows are not refunded. Bookings open about two weeks ahead, twice a month (for the 1st–15th and for the 16th to the end of the month). Arriving late does not extend your end time. You can enter 5 minutes before your slot (there is no waiting area) with a QR code; the reception is unstaffed. Guests who have been drinking cannot use the facility (facility terms). The official site says nothing about tattoos.
Details
| Area | Roppongi, Tokyo, Japan |
|---|---|
| Address | Kobayashi Building B1F, 7-10-3 Roppongi, Minato, Tokyo |
| Access | The official site does not give the nearest station or walking time. |
| Hours | 24 hours |
| Official site | kudochi-sauna.com/roppongi-onsen (Japanese, with an English page) |
| Map | Search on Google Maps |
Prices are in Japanese yen. Prices, discounts and hours change, so confirm on the official site before you book. Many venues charge by the number of guests: check whether a price is per room or per person. This page in Japanese: KUDOCHI onsen 六本木. See all private saunas in Japan.