Right Onsen › Gunma › Numata
Shirasawa Kogen Onsen Hatsuho-no-Yu
4.3★ · 177 Google ratings · Numata, Gunma · 白沢高原温泉 初穂の湯
✓ Day visitors✓ Outdoor bath✓ Kakenagashi✓ Sauna
Before you go
Can you bathe here?
Day visitors
✓ YesConfirmed by recent visitor reports
Hours
12:00–20:30From the facility's listing
Tattoos
? Call aheadNo policy stated in the 38 recent reviews we read
Price
¥1,000 adultConfirmed by recent visitor reports
Bathing
Men and women separateReported by two visitors
How we know this
- Day visitors: Day-use is widely confirmed. · 5 visitors, Jan 2024 – Jun 2026
- Price: Adult admission is ¥1,000 (child ¥500, infant ¥200); one longtime visitor recalls it being ¥500 in the distant past. · 5 visitors, Feb 2025 – Jun 2026
- Bathing arrangement: Men's and women's baths are separate, and reviewers note the men's bath is notably larger/better equipped. · 2 visitors, Jan 2026 – Feb 2026
The bath
What you’ll find
A slick alkaline kakenagashi bath attached to a golf course and hotel near Numata, with sauna, cold bath, ¥1,000 admission, and a smooth 'bijin-no-yu' feel, though day-use visitors should bring their own towel and the restaurant's lunch service is unreliable.
Bath setup
Indoor baths
1.0Reported by one visitor
Outdoor bath
✓ YesConfirmed by recent visitor reports
Outdoor baths
2.0Reported by two visitors
Sauna
✓ YesConfirmed by recent visitor reports
Cold bath
✓ YesConfirmed by recent visitor reports
View
ForestReported by two visitors
Spring water
Spring type
alkaline simple springConfirmed by recent visitor reports
pH
pH 9.8Reported by one visitor
Free-flowing (kakenagashi)
✓ FullFresh spring water flows continuously through the bath
How we know this
- Indoor baths: One reviewer counts a single indoor bath. · 1 visitor, Aug 2025
- Outdoor bath: There are two outdoor baths (one warmer, one hotter). · 3 visitors, Aug 2025 – Jun 2026
- Outdoor baths: Two reviewers independently count two outdoor baths. · 2 visitors, Aug 2025 – Jun 2026
- Sauna: Sauna is confirmed by many reviewers. · 9 visitors, Feb 2025 – Jun 2026
- Cold bath: A cold plunge bath is confirmed by multiple reviewers. · 5 visitors, Feb 2025 – Mar 2026
- View: Reviewers describe autumn-leaf views from the outdoor bath. · 2 visitors, Jun 2025 – Nov 2025
- Spring type: Repeatedly described as an alkaline (simple) spring with a smooth, skin-softening feel. · 4 visitors, Mar 2024 – Jun 2026
- pH: One reviewer cites a pH of 9.8. · 1 visitor, May 2026
- Free-flowing (kakenagashi): Multiple reviewers, including a detailed one citing pH, confirm the spring is kakenagashi. · 4 visitors, Feb 2025 – Jun 2026
Practical
What you need
Towels
Bring your ownMost reviewers say day-use (non-golfer) visitors must bring their own towel, since golf-course towels run out by evening; one reviewer, however, reported towels included.Confirmed by recent visitor reports
Lockers
✓ Coin returnedReported by two visitors
Hair dryer
✓ YesReported by two visitors
Parking
✓ On siteFrom the facility's listing
Accessibility
Step-free entrance and accessible parkingFrom the facility's listing. Bath access not confirmed
Facilities
Rest area
✕ NoReported by one visitor
Restaurant
✓ YesA restaurant exists, but one day-use visitor was told food service had already ended when they arrived expecting lunch, and staff gave conflicting information.Reported by one visitor
Lodging
✓ YesConfirmed by recent visitor reports
How we know this
- Towels: Most reviewers say day-use (non-golfer) visitors must bring their own towel, since golf-course towels run out by evening; one reviewer, however, reported towels included. · 4 visitors, Aug 2024 – Apr 2026
- Lockers: Lockers use a ¥100 refundable coin-return system; one reviewer notes there's no change machine nearby. · 2 visitors, Feb 2025 – Mar 2025
- Hair dryer: Hair dryers (including a premium Refa dryer) are provided. · 2 visitors, Feb 2025 – Jan 2026
- Rest area: One reviewer notes there is almost no rest/cool-down space for sauna users. · 1 visitor, Dec 2025
- Restaurant: A restaurant exists, but one day-use visitor was told food service had already ended when they arrived expecting lunch, and staff gave conflicting information. · 1 visitor, Apr 2026
- Lodging: A hotel is attached to the golf-course clubhouse. · 4 visitors, Jan 2024 – Jun 2026
Timing
When to go
Weekly hours
| Day | Hours |
|---|---|
| Monday | 12:00–20:30 |
| Tuesday | 12:00–20:30 |
| Wednesday | 12:00–20:30 |
| Thursday | 12:00–20:30 |
| Friday | 12:00–20:30 |
| Saturday | 12:00–20:30 |
| Sunday | 12:00–20:30 |
Getting there
How to get there
Nearest station
Numata9.3 km in a straight line; bus or taxi from the station
Address
2440 Shirasawamachi Kamikokobu, Numata, Gunma 378-0126From the facility's listing
Show a driver
白沢高原温泉 初穂の湯The name in Japanese, for a taxi or at the counter
Phone
+81278-53-2010Japanese-speaking. For tattoos or private baths a call is the only sure answer
Website
www.shirasawa-kougen.comOfficial, in Japanese
The map loads only when you ask for it and connects your browser to Google.
Nearby
Other baths close by
Fujiyama Village Sakuragawa Onsen Seseragi no Yu
4.2★ · 6.2 km · Kawaba
✓Day useTattoos ?✓Outdoor bath
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Questions
Common questions
Can I visit Shirasawa Kogen Onsen Hatsuho-no-Yu without staying overnight?
Day-use is widely confirmed.
How much does Shirasawa Kogen Onsen Hatsuho-no-Yu cost?
Adult admission is ¥1,000 (child ¥500, infant ¥200); one longtime visitor recalls it being ¥500 in the distant past.
Is the water free-flowing spring water?
Multiple reviewers, including a detailed one citing pH, confirm the spring is kakenagashi.
