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
✓ Natural hot-spring water✓ Free-flowing source water✓ Outdoor bath✓ Rest area✓ Restaurant
Before you go
Can you bathe here?
Tattoos
Not allowedstated on the facility's website · read 2026-09
Hours
10:00–00:00from the facility listing
Price
¥1,000Weekend/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.stated by 2 visitors · Apr 2026 – Jun 2026
the facility's website lists ¥850 · source, read 2026-09
the facility's website lists ¥850 · source, read 2026-09
Bathing arrangement
Men and women separateReviewers describe separate men's and women's baths and changing rooms.stated by 2 visitors · Jun 2026 – Aug 2026
Watch out
Hair dryer
An overwhelming number of reviewers complain that all provided hair dryers cost 100 yen for 5 minutes.
stated by 10 visitors · Feb 2026 – Aug 2026The 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.
Outdoor bath
✓ YesMultiple reviewers describe outdoor cypress, stone and tsubo baths.stated by 5 visitors · May 2026 – Aug 2026
Indoor baths
5One reviewer counts five indoor baths including the cold plunge.stated by 1 visitor · Aug 2026
Sauna
✓ YesA far-infrared two-tier sauna plus a low-temp salt steam room are described by several reviewers.stated by 6 visitors · Apr 2026 – Aug 2026
Cold bath
✓ YesA cold plunge exists but reviewers call it small and, at times, not very cold.stated by 3 visitors · Apr 2026 – Jul 2026
Rest area
✓ YesThere is an outdoor lounging area and a tatami rest space alongside the dining tables.stated by 2 visitors · Apr 2026 – May 2026
Restaurant
✓ YesThe facility has an on-site restaurant/dining area.stated by 2 visitors · Mar 2026 – Jun 2026
The water
Free-flowing (kakenagashi)
PartlyThe cypress and tsubo tubs run on kakenagashi natural spring water, but the reviews confirm the other outdoor and indoor baths are recirculated.stated by 4 visitors · May 2026 – Aug 2026
Spring type
Sodium chlorideOne reviewer identifies the spring as a sodium chloride (salt) type.stated by 1 visitor · Jun 2026
Practical
What to bring
Lockers
✓ Coin returnedShoe lockers require a returnable 100 yen coin deposit.stated by 2 visitors · Jun 2026 – Jul 2026
Hair dryer
PaidAn overwhelming number of reviewers complain that all provided hair dryers cost 100 yen for 5 minutes.stated by 10 visitors · Feb 2026 – Aug 2026
Guide
What visitors add
Towels, soap & lockers
Hair dryers cost extra — reported by 11 distinct reviewers, the most-repeated complaint here; two of them specify 100 yen per 5 minutes (one notes they are Dyson dryers), and one notes you may plug in your own dryer for free. One reviewer says no amenities (toiletries) are laid out; one reviewer rented a towel for 200 yen.
stated by 11 visitors · Feb 2026 – Aug 2026Outdoor bath & sauna
There is a high-temperature sauna plus a low-temperature steam sauna with salt available (salt sauna), and a cold-water bath. Three reviewers describe the hot sauna as small/cramped, and two note the temperature drops noticeably whenever the door opens. One reviewer describes the sauna as a far-infrared two-tier type; one says the cold bath is small and another says it is not very cold.
stated by 6 visitors · Apr 2026 – Aug 2026Water handling
Four reviewers report genuine source-fed free-flowing (kakenagashi) hot spring water here; one of them specifies that only the hinoki (cypress) bath and the tsubo (pot) baths are kakenagashi while the other outdoor baths are recirculated and the indoor plain bath is ordinary heated water.
stated by 4 visitors · May 2026 – Aug 2026Outdoor bath & sauna
There is an outdoor bath area including a hinoki (cypress) bath and tsubo (pot) baths — mentioned by four reviewers; one notes the main outdoor bath runs hot while the tsubo bath is lukewarm.
stated by 4 visitors · Jun 2026 – Aug 2026The water
One reviewer identifies the spring as a sodium-chloride hot spring; another describes the water as colorless and odorless with a slightly slippery feel.
stated by 2 visitors · Apr 2026 – Jun 2026Towels, soap & lockers
Shoe lockers take a 100-yen coin that is returned when you leave — reported by two reviewers.
stated by 2 visitors · Jun 2026 – Jul 2026Timing
When to go
Quietest Tuesday around 10:00; busiest Friday around 20:00. Measured by Google over past visits, not a forecast.
| 8A | 9A | 10A | 11A | 12P | 13P | 14P | 15P | 16P | 17P | 18P | 19P | 20P | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MO | |||||||||||||
| TU | |||||||||||||
| WE | |||||||||||||
| TH | |||||||||||||
| FR | |||||||||||||
| SA | |||||||||||||
| SU |
Quiet Busy
| 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 |
Practical
Plan your visit
📍 540 Shimokobayashicho, Ota, Gunma 373-0807
🚃 Ryumai station, 1.6 km
📞 +81276-46-1126
📋 Show at the counter: 天然温泉 太田安眠の湯
Nearby
Other baths close by
Ota · 3.8★
Ota · 3.3★
Contribute
Been here recently?
Help other visitors with fresh information about Ota Anmin-no-Yu Natural Onsen. Everything below is optional except the last box.
