Right Onsen › Gunma › Ota
Ota Anmin-no-Yu Natural Onsen
3.7★ · 998 Google ratings · Ota, Gunma · 天然温泉 太田安眠の湯
✓ Day visitors✓ Outdoor bath✓ Sauna
Before you go
Can you bathe here?
Day visitors
✓ YesStated on the facility's website
Hours
10:00–00:00From the facility's listing
Closed
4th TuesdayStated on the facility's website
Last entry
23:00Stated on the facility's website
Tattoos
✕ Not allowedStated on the facility's website
Price
¥1,000 adultRecent visitor reports indicate a change. The official site still lists ¥850
Child price
¥380Stated on the facility's website
Private bath
Yes, by reservationStated on the facility's website
Bathing
Men and women separateReported by two visitors
How we know this
- Day visitors: stated on the facility's website, read 2026-09
- Closed: stated on the facility's website, read 2026-09
- Last entry: stated on the facility's website, read 2026-09
- Tattoos: stated on the facility's website, read 2026-09
- Price: Weekend/holiday admission is 1000 yen, though reviewers also mention lower weekday and discount-day prices (800-900 yen) and a 600 yen bath-day special. · 2 visitors, Apr 2026 – Jun 2026
- Child price: stated on the facility's website, read 2026-09
- Private bath: stated on the facility's website, read 2026-09
- Bathing arrangement: Reviewers describe separate men's and women's baths and changing rooms. · 2 visitors, Jun 2026 – Aug 2026
The bath
What you’ll find
A large suburban super-sento next to an Aeon Mall with several indoor and outdoor baths, cypress and tsubo kakenagashi tubs alongside recirculated pools, a sauna and cold plunge, but a near-universal complaint of pay-per-use hair dryers.
Bath setup
Indoor baths
5.0Reported by one visitor
Outdoor bath
✓ YesConfirmed by recent visitor reports
Sauna
✓ YesConfirmed by recent visitor reports
Cold bath
✓ YesConfirmed by recent visitor reports
Private bath
Yes, by reservationStated on the facility's website
Spring water
Spring type
sodium chlorideReported by one visitor
Free-flowing (kakenagashi)
Partly confirmedFresh spring water flows continuously through the bath
How we know this
- Indoor baths: One reviewer counts five indoor baths including the cold plunge. · 1 visitor, Aug 2026
- Outdoor bath: Multiple reviewers describe outdoor cypress, stone and tsubo baths. · 5 visitors, May 2026 – Aug 2026
- Sauna: A far-infrared two-tier sauna plus a low-temp salt steam room are described by several reviewers. · 6 visitors, Apr 2026 – Aug 2026
- Cold bath: A cold plunge exists but reviewers call it small and, at times, not very cold. · 3 visitors, Apr 2026 – Jul 2026
- Private bath: stated on the facility's website, read 2026-09
- Spring type: One reviewer identifies the spring as a sodium chloride (salt) type. · 1 visitor, Jun 2026
- Free-flowing (kakenagashi): The cypress and tsubo tubs run on kakenagashi natural spring water, but the reviews confirm the other outdoor and indoor baths are recirculated. · 4 visitors, May 2026 – Aug 2026
Practical
What you need
Towels
Rental availableStated on the facility's website
Soap & shampoo
✓ ProvidedStated on the facility's website
Lockers
✓ Coin returnedReported by two visitors
Payment
✓ Cards & QR acceptedStated on the facility's website
Hair dryer
PaidHair dryers cost 100 yen for 5 minutes.Confirmed by recent visitor reports
Parking
✓ Free on siteFrom the facility's listing
Accessibility
Step-free entrance and accessible parkingFrom the facility's listing. Bath access not confirmed
Facilities
Rest area
✓ YesReported by two visitors
Restaurant
✓ YesReported by two visitors
How we know this
- Towels: stated on the facility's website, read 2026-09
- Soap & shampoo: stated on the facility's website, read 2026-09
- Lockers: Shoe lockers require a returnable 100 yen coin deposit. · 2 visitors, Jun 2026 – Jul 2026
- Payment: stated on the facility's website, read 2026-09
- Hair dryer: Hair dryers cost 100 yen for 5 minutes. · 10 visitors, Feb 2026 – Aug 2026
- Rest area: There is an outdoor lounging area and a tatami rest space alongside the dining tables. · 2 visitors, Apr 2026 – May 2026
- Restaurant: The facility has an on-site restaurant/dining area. · 2 visitors, Mar 2026 – Jun 2026
Timing
When to go
Quietest Tuesday around 10:00. Busiest Friday around 20:00.
| 8A | 9A | 10A | 11A | 12P | 13P | 14P | 15P | 16P | 17P | 18P | 19P | 20P | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MO | |||||||||||||
| TU | |||||||||||||
| WE | |||||||||||||
| TH | |||||||||||||
| FR | |||||||||||||
| SA | |||||||||||||
| SU |
Quiet Busy
Based on Google visit patterns, not a forecast.
Weekly hours
| Day | Hours |
|---|---|
| Monday | 10:00–00:00 |
| Tuesday | 10:00–00:00 |
| Wednesday | 10:00–00:00 |
| Thursday | 10:00–00:00 |
| Friday | 10:00–00:00 |
| Saturday | 10:00–00:00 |
| Sunday | 10:00–00:00 |
Closed 4th Tuesday.
Getting there
How to get there
Nearest station
RyumaiAbout 20 min on foot, 1.6 km in a straight line
Address
540 Shimokobayashicho, Ota, Gunma 373-0807From the facility's listing
Show a driver
天然温泉 太田安眠の湯The name in Japanese, for a taxi or at the counter
Phone
+81276-46-1126Japanese-speaking. For tattoos or private baths a call is the only sure answer
Website
www.anminnoyu.comOfficial, in Japanese
The map loads only when you ask for it and connects your browser to Google.
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Questions
Common questions
How much does Ota Anmin-no-Yu Natural Onsen cost?
Weekend/holiday admission is 1000 yen, though reviewers also mention lower weekday and discount-day prices (800-900 yen) and a 600 yen bath-day special.
Is the water free-flowing spring water?
The cypress and tsubo tubs run on kakenagashi natural spring water, but the reviews confirm the other outdoor and indoor baths are recirculated.
