Right Onsen › Gunma › Ota
Ryu-no-Ki Enzyme Bath
4.8★ · 12 Google ratings · Ota, Gunma · 酵素風呂 龍の木
✓ Day visitors✓ Private bath
Before you go
Can you bathe here?
Day visitors
✓ YesStated on the facility's website
Hours
10:00–19:00From the facility's listing
Closed
WednesdayWeekly closing days from the listing
Tattoos
? Call aheadNo policy stated in the 11 recent reviews we read or on the facility's website
Private bath
✓ AvailableStated on the facility's website
Time limit
15 minutesReported by two visitors
How we know this
- Day visitors: stated on the facility's website, read 2026-09
- Private bath: Every session is fully private in its own room; guests never encounter other customers. · stated on the facility's website, read 2026-09 · 2 visitors, Sep 2025 – Mar 2026
- Time limit: Sessions in the bran bath itself run 15 minutes, which some reviewers wished were a bit longer. · 2 visitors, Aug 2025 – Sep 2025
The bath
What you’ll find
Not a hot spring at all but a boutique, fully-private rice-bran fermentation (koso-buro/enzyme) bath studio, where guests lie nude or in paper underwear in warm fermented rice bran for a set session, followed by a mist shower, skincare, and a private cooldown room.
Bath setup
Private bath
✓ YesStated on the facility's website
How we know this
- Private bath: Every session is fully private in its own room; guests never encounter other customers. · stated on the facility's website, read 2026-09 · 2 visitors, Sep 2025 – Mar 2026
Practical
What you need
Towels
✓ IncludedReported by two visitors
Soap & shampoo
✓ ProvidedStated on the facility's website
Parking
✓ Free on siteFrom the facility's listing
How we know this
- Towels: Towels and a robe are provided as part of the session; one reviewer wished there were a discount for bringing your own instead. · 2 visitors, Aug 2025 – Sep 2025
- Soap & shampoo: stated on the facility's website, read 2026-09
Timing
When to go
Weekly hours
| Day | Hours |
|---|---|
| Monday | 10:00–19:00 |
| Tuesday | 10:00–19:00 |
| Wednesday | Closed |
| Thursday | 10:00–19:00 |
| Friday | 10:00–19:00 |
| Saturday | 10:00–19:00 |
| Sunday | 10:00–19:00 |
Closed Wednesday.
Getting there
How to get there
Nearest station
Koizumi-machiAbout 13 min on foot, 1.1 km in a straight line
Address
81-1 Ryumaicho, Ota, Gunma 373-0806From the facility's listing
Show a driver
酵素風呂 龍の木The name in Japanese, for a taxi or at the counter
Phone
+8170-9155-2617Japanese-speaking. For tattoos or private baths a call is the only sure answer
Website
www.kosoryunokikoso.comOfficial, in Japanese
The map loads only when you ask for it and connects your browser to Google.
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