Right Onsen › Gunma › Annaka
Natural Hot Spring Toge-no-Yu
4.1★ · 1,905 Google ratings · Annaka, Gunma · 碓氷峠の森公園 峠の湯
✓ Day visitors✓ Outdoor bath✓ Private bath✓ Sauna
Before you go
Can you bathe here?
Day visitors
✓ YesStated on the facility's website
Hours
10:00–21:00From the facility's listing
Closed
IrregularStated on the facility's website
Last entry
20:30Stated on the facility's website
Tattoos
? Call aheadNo policy stated in the 29 recent reviews we read or on the facility's website
Price
¥700 adultConfirmed by recent visitor reports
Private bath
✓ AvailableStated on the facility's website
Time limit
3 hoursConfirmed by recent visitor reports
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
- Price: Adult admission is ¥700 on weekdays and ¥800 on weekends/holidays for a 3-hour stay. · 5 visitors, May 2026 – Aug 2026
- Private bath: Family/private baths and rooms can be reserved in advance. · stated on the facility's website, read 2026-09 · 2 visitors, May 2026 – Jul 2026
- Time limit: Admission grants a 3-hour stay. · 4 visitors, May 2026 – Aug 2026
The bath
What you’ll find
A large, striking mountain-pass bathhouse (styled like the Meganebashi bridge) on the way to Karuizawa, with sauna, cold bath, indoor/outdoor baths, alkaline/saline spring water, a 3-hour ¥700-800 admission, and free parking that gates shut overnight.
Bath setup
Outdoor bath
✓ YesConfirmed by recent visitor reports
Sauna
✓ YesConfirmed by recent visitor reports
Cold bath
✓ YesConfirmed by recent visitor reports
Private bath
✓ YesStated on the facility's website
Family bath
✓ YesStated on the facility's website
View
MountainReported by two visitors
Spring water
Spring type
alkaline, slightly salineReported by two visitors
How we know this
- Outdoor bath: An outdoor bath is widely confirmed. · 4 visitors, May 2026 – Jul 2026
- Sauna: A sauna is confirmed by several reviewers. · 5 visitors, May 2026 – Jun 2026
- Cold bath: A cold plunge bath is confirmed, measured around 18-20°C by one reviewer. · 3 visitors, May 2026 – Jun 2026
- Private bath: Family/private baths and rooms can be reserved in advance. · stated on the facility's website, read 2026-09 · 2 visitors, May 2026 – Jul 2026
- Family bath: stated on the facility's website, read 2026-09
- View: Mountain views (including Mt. Myogi) are visible from the outdoor bath. · 2 visitors, Jun 2026 – Jul 2026
- Spring type: Described as alkaline with a slightly salty smell. · 2 visitors, Jul 2026
Practical
What you need
Soap & shampoo
✓ ProvidedReported by two visitors
Parking
✓ Free on siteFrom the facility's listing
Accessibility
Step-free entrance, accessible restroom and accessible parkingFrom the facility's listing. Bath access not confirmed
Facilities
Rest area
✓ YesConfirmed by recent visitor reports
Restaurant
✓ YesConfirmed by recent visitor reports
How we know this
- Soap & shampoo: Shampoo and body soap are provided. · 2 visitors, May 2026 – Jul 2026
- Rest area: A rest area is repeatedly confirmed. · 4 visitors, Jun 2026 – Aug 2026
- Restaurant: An on-site restaurant is confirmed, though one reviewer found it a bit pricey. · 5 visitors, May 2026 – Jul 2026
Timing
When to go
Quietest Tuesday around 20:00. Busiest Saturday around 14:00.
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Quiet Busy
Based on Google visit patterns, not a forecast.
Weekly hours
| Day | Hours |
|---|---|
| Monday | 10:00–21:00 |
| Tuesday | 10:00–21:00 |
| Wednesday | 10:00–21:00 |
| Thursday | 10:00–21:00 |
| Friday | 10:00–21:00 |
| Saturday | 10:00–21:00 |
| Sunday | 10:00–21:00 |
Closed Irregular.
Getting there
How to get there
Nearest station
Yokokawa · JR East2.6 km in a straight line; bus or taxi from the station
Address
1222 Matsuidamachi Sakamoto, Annaka, Gunma 379-0307From the facility's listing
Show a driver
碓氷峠の森公園 峠の湯The name in Japanese, for a taxi or at the counter
Phone
+8127-380-4000Japanese-speaking. For tattoos or private baths a call is the only sure answer
Website
usui-pass.comOfficial, in Japanese
The map loads only when you ask for it and connects your browser to Google.
Nearby
Other baths close by
Myōgi Fureai Plaza / Myōgi Onsen Hot Spring ‘Momiji no Yu’
3.9★ · 7.7 km · Tomioka
✓Day useTattoos ?✓Outdoor bath✓Sauna
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Questions
Common questions
How much does Natural Hot Spring Toge-no-Yu cost?
Adult admission is ¥700 on weekdays and ¥800 on weekends/holidays for a 3-hour stay.
