Right Onsen › Gunma › Ota
Genji Yudan
3.3★ · 379 Google ratings · Ota, Gunma · 源泉 湯乃庵
✓ Day visitors✓ Sauna
Before you go
Can you bathe here?
Day visitors
✓ YesFrom the facility's listing
Hours
10:00–21:30From the facility's listing
Tattoos
? Call aheadNo policy stated in the 33 recent reviews we read
Price
¥500 adultConfirmed by recent visitor reports
How we know this
- Day visitors: Listed as a day-use onsen: a bath for day visitors by definition. No visitor review states otherwise. · from the listing category
- Price: Admission is ¥500 on weekdays and ¥650 on weekends/holidays. · 8 visitors, Jul 2025 – Jun 2026
The bath
What you’ll find
A sodium-chloride spa attached to a fitness gym costs ¥500 on weekdays and ¥650 on weekends, offers sauna, cold bath, and a paid rock-bath course, though sources disagree on whether the water is free-flowing source water or recirculated.
Bath setup
Indoor baths
1.0Reported by one visitor
Sauna
✓ YesConfirmed by recent visitor reports
Cold bath
✓ YesA cold plunge bath is confirmed, though one reviewer complained it looked unclean.Confirmed by recent visitor reports
Spring water
Spring type
sodium chlorideReported by two visitors
Free-flowing (kakenagashi)
Partly confirmedReported by two visitors
Chlorinated
✓ YesConfirmed by recent visitor reports
How we know this
- Indoor baths: One reviewer counts one indoor and one outdoor bath. · 1 visitor, Nov 2025
- Sauna: A sauna is confirmed by many reviewers. · 8 visitors, Nov 2025 – Aug 2026
- Cold bath: A cold plunge bath is confirmed, though one reviewer complained it looked unclean. · 3 visitors, Nov 2025 – Jul 2026
- Spring type: The outdoor bath's spring is a hypertonic sodium chloride (salt) spring. · 2 visitors, Jun 2026 – Jul 2026
- Free-flowing (kakenagashi): One detailed reviewer reports the indoor bath uses well water and the outdoor bath is recirculated, not kakenagashi; a separate casual review calls it kakenagashi, so treat with some caution. · 2 visitors, Jun 2026
- Chlorinated: Two reviewers report a strong chlorine smell in both baths; one other reviewer says there was no chlorine smell, attributing it to mineral-rich groundwater. · 3 visitors, Nov 2025 – May 2026
Practical
What you need
Soap & shampoo
✓ ProvidedConfirmed by recent visitor reports
Lockers
✓ Coin returnedReported by two visitors
Payment
✓ Cards & QR acceptedReported by two visitors
Hair dryer
✓ YesReported by two visitors
Accessibility
Step-free entrance and accessible parkingFrom the facility's listing. Bath access not confirmed
Facilities
Restaurant
✓ YesConfirmed by recent visitor reports
How we know this
- Soap & shampoo: Shampoo and body soap are provided, though one reviewer noted the lather was weak and recommended bringing your own. · 3 visitors, Oct 2025 – Jul 2026
- Lockers: Lockers use a ¥100 coin-return system. · 2 visitors, Oct 2025 – May 2026
- Payment: PayPay is accepted in addition to cash. · 2 visitors, Oct 2025 – May 2026
- Hair dryer: Free hair dryers are available, plus a paid option. · 2 visitors, Oct 2025 – May 2026
- Restaurant: A restaurant with meal-set options is confirmed. · 4 visitors, Jul 2025 – Dec 2025
Timing
When to go
Quietest Monday around 10:00. Busiest Tuesday around 20:00.
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Quiet Busy
Based on Google visit patterns, not a forecast.
Weekly hours
| Day | Hours |
|---|---|
| Monday | 10:00–21:30 |
| Tuesday | 10:00–22:30 |
| Wednesday | 10:00–22:30 |
| Thursday | 10:00–22:30 |
| Friday | 10:00–22:30 |
| Saturday | 10:00–21:30 |
| Sunday | 10:00–21:30 |
Getting there
How to get there
Nearest station
HosoyaAbout 21 min on foot, 1.6 km in a straight line
Address
474-8 Shimohamadacho, Ota, Gunma 373-0821From the facility's listing
Show a driver
源泉 湯乃庵The name in Japanese, for a taxi or at the counter
Phone
+81276-49-2211Japanese-speaking. For tattoos or private baths a call is the only sure answer
Website
noma-ss.jpOfficial, in Japanese
The map loads only when you ask for it and connects your browser to Google.
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What matters
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Questions
Common questions
Can I visit Genji Yudan without staying overnight?
Listed as a day-use onsen: a bath for day visitors by definition. No visitor review states otherwise.
How much does Genji Yudan cost?
Admission is ¥500 on weekdays and ¥650 on weekends/holidays.
Is the water free-flowing spring water?
One detailed reviewer reports the indoor bath uses well water and the outdoor bath is recirculated, not kakenagashi; a separate casual review calls it kakenagashi, so treat with some caution.
