Right Onsen › Gunma › Numata
Bokyo-no-Yu (Shirasawa Roadside Station)
3.8★ · 1,832 Google ratings · Numata, Gunma · 望郷の湯（道の駅 白沢）
✓ Day visitors✓ Outdoor bath✓ Sauna
Before you go
Can you bathe here?
Day visitors
✓ YesFrom the facility's listing
Hours
10:00–21:00From the facility's listing
Tattoos
? Call aheadNo policy stated in the 29 recent reviews we read or on the facility's website
Price
¥800 adultConfirmed by recent visitor reports
Time limit
2 hours (additional charge for longer stays)Confirmed 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: Base admission (2 hours) rose from 700 yen to 800 yen effective May 1, 2026. · 3 visitors, Apr 2026 – Aug 2026
- Time limit: Entry is sold in 2-hour blocks with additional charges for staying longer. · 4 visitors, Apr 2026 – Jul 2026
The bath
What you’ll find
A scenic alkaline 'beauty water' onsen with an outdoor bath overlooking a river terrace and mountain view, attached to Michi-no-Eki Shirasawa with a restaurant and sauna, with paid extras (locker, dryer) and a recent price increase.
Bath setup
Outdoor bath
✓ YesConfirmed by recent visitor reports
Sauna
✓ YesConfirmed by recent visitor reports
Cold bath
✓ YesConfirmed by recent visitor reports
View
MountainConfirmed by recent visitor reports
Spring water
Spring type
alkalineConfirmed by recent visitor reports
pH
pH 9.8Reported by one visitor
How we know this
- Outdoor bath: Open-air rotenburo with river-terrace and mountain views is the facility's main draw. · 8 visitors, May 2026 – Aug 2026
- Sauna: A dry sauna (around 94C, 6-person capacity) is available. · 4 visitors, Apr 2026 – Jun 2026
- Cold bath: A cold plunge pool sits next to the sauna, though one reviewer found it too lukewarm. · 3 visitors, Apr 2026 – Aug 2026
- View: The outdoor bath overlooks a river terrace with mountain (Mt. Akagi) panoramas, widely praised as the highlight. · 5 visitors, May 2026 – Jun 2026
- Spring type: A slick, alkaline spring widely described as smoothing to the skin. · 3 visitors, May 2026 – Jun 2026
- pH: Water is a high-alkaline pH 9.8 'beauty water' (bijin-no-yu) spring. · 1 visitor, May 2026
Practical
What you need
Lockers
Coin not returnedKeyed lockers cost 100 yen that is NOT refunded; a free (non-locking) basket bin is offered as an alternative for valuables left elsewhere.Confirmed by recent visitor reports
Hair dryer
✓ YesHair dryers are available but cost extra (100 yen), a frequent complaint among reviewers.Confirmed by recent visitor reports
Accessibility
Step-free entrance 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
- Lockers: Keyed lockers cost 100 yen that is NOT refunded; a free (non-locking) basket bin is offered as an alternative for valuables left elsewhere. · 3 visitors, Jun 2026 – Aug 2026
- Hair dryer: Hair dryers are available but cost extra (100 yen), a frequent complaint among reviewers. · 5 visitors, Apr 2026 – Aug 2026
- Rest area: Spacious rest area/lounge with a koi pond view and benches. · 3 visitors, May 2026 – Jun 2026
- Restaurant: An on-site restaurant serves local dishes, plus a soft-serve stand and farm produce shop. · 5 visitors, Apr 2026 – Aug 2026
Timing
When to go
Quietest Monday around 20:00. Busiest Saturday around 17:00.
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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 |
Getting there
How to get there
Nearest station
Numata7.8 km in a straight line; bus or taxi from the station
Address
1297 Shirasawamachi Hiraide, Numata, Gunma 378-0125From the facility's listing
Show a driver
望郷の湯（道の駅 白沢）The name in Japanese, for a taxi or at the counter
Phone
+81278-53-3939Japanese-speaking. For tattoos or private baths a call is the only sure answer
Website
www.boukyou.comOfficial, 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 Bokyo-no-Yu (Shirasawa Roadside Station) without staying overnight?
Listed as a day-use onsen: a bath for day visitors by definition. No visitor review states otherwise.
How much does Bokyo-no-Yu (Shirasawa Roadside Station) cost?
Base admission (2 hours) rose from 700 yen to 800 yen effective May 1, 2026.
