Right Onsen › Gunma › Ota
Ryu-no-Ki Enzyme Bath
4.8★ · 12 Google ratings · Ota, Gunma · 酵素風呂 龍の木
Before you go
Can you bathe here?
Private bath
✓ YesEvery session is fully private in its own room; guests never encounter other customers.stated by 2 visitors · Sep 2025 – Mar 2026
Hours
10:00–19:00 · closed Wednesdayfrom the facility listing
Time limit
15 minutesSessions in the bran bath itself run 15 minutes, which some reviewers wished were a bit longer.stated by 2 visitors · Aug 2025 – Sep 2025
Tattoos
Not known · call aheadno policy stated in the 11 recent reviews we read or on the facility's website
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.
Practical
What to bring
Towels
✓ IncludedTowels and a robe are provided as part of the session; one reviewer wished there were a discount for bringing your own instead.stated by 2 visitors · Aug 2025 – Sep 2025
Guide
What visitors add
The water
This is not a hot spring but a rice-bran enzyme bath (koso-buro): you lie buried in warm fermented 100%-rice-bran (one reviewer's description) that heats gently rather than scalding; 5 distinct reviewers report heavy sweating, and reviewers separately note lingering warmth for hours afterward, eased headache, and smoother skin.
stated by 8 visitors · Aug 2025 – Dec 2025Staffing
The salon is attentively staffed one-on-one: reviewers report an initial counseling session, careful explanations, regular voice check-ins during the session, and staff adjusting the heat on request (pouring water, freeing hands and feet) — 5 distinct reviews.
stated by 5 visitors · Aug 2025 – Mar 2026Private bath
The experience is effectively private: reviewers describe fully private rooms, never meeting other customers face to face, and staff who wait in a back room so you are not seen undressed (4 distinct reviews).
stated by 4 visitors · Sep 2025 – Mar 2026Towels, soap & lockers
Amenities are provided: gowns/room wear (hemp, per one reviewer) and towels are supplied, showers use ReFa mist shower heads (3 reviews), and one reviewer mentions jojoba oil, skincare and a face pack; a second also received a face pack.
stated by 4 visitors · Aug 2025 – Mar 2026Day-use visits
A session in the bran bed lasts 15 minutes (2 reviews); one of the two felt 15 minutes was short for the price and wished it were 20.
stated by 2 visitors · Aug 2025 – Sep 2025Bathing arrangement
You bathe in the bran naked by default, but paper pants are provided on request for menstruation or modesty (1 review); a second reviewer separately confirms you can bathe during menstruation.
stated by 2 visitors · Sep 2025 – Mar 2026Timing
When to go
| 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.
Practical
Plan your visit
📍 81-1 Ryumaicho, Ota, Gunma 373-0806
🚃 Koizumi-machi station, 1.1 km
📞 +8170-9155-2617
📋 Show at the counter: 酵素風呂 龍の木
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