Right Onsen › Gunma › Kusatsu
Niekawa-no-Yu Public Bath
4.4★ · 390 Google ratings · Kusatsu, Gunma · 煮川乃湯（共同浴場）
✓ Day visitors✓ Kakenagashi
Before you go
Can you bathe here?
Day visitors
✓ YesConfirmed by recent visitor reports
Hours
00:00–24:00From the facility's listing
Tattoos
? Call aheadNo policy stated in the 44 recent reviews we read or on the facility's website
Price
Free adultConfirmed by recent visitor reports
How we know this
- Day visitors: Multiple reviewers confirm tourists can use the bath; one states it is now open 24 hours with no restrictions for tourists since post-COVID. · 4 visitors, Oct 2025 – Aug 2026
- Price: Consistently described as free with no admission charge; operated on voluntary donations. · 4 visitors, Aug 2025 – May 2026
Atmosphere
The bath
What you’ll find
Free public bath in Kusatsu fed by scalding 48°C Nikawa spring (acid-sulfur); extremely hot, visitors soak briefly via repeated pouring before entering.
Bath setup
Indoor baths
1.0Confirmed by recent visitor reports
Spring water
Spring type
acid sulfur aluminum sulfate chlorideConfirmed by recent visitor reports
Source temperature
48.8°CReported by one visitor
Bath temperature
47°CReviewers consistently report 46–50°C water temperature; official analysis shows source at 48.8°C piped directly without cooling.Confirmed by recent visitor reports
pH
pH 2.1Reported by one visitor
Free-flowing (kakenagashi)
✓ FullFresh spring water flows continuously through the bath
How we know this
- Indoor baths: One small communal bath per gender, roughly 2–5 person capacity total (bath plus washing stations); one (single tap) for filling buckets. · 3 visitors, Aug 2025 – Jun 2026
- Spring type: Official classification: low-tension acidic hot spring, acid-sulfur-aluminum-sulfate-chloride with hydrogen sulfide type; 236.6 mg metasilicic acid. · 3 visitors, Sep 2025 – Jun 2026
- Source temperature: Official analysis dated 2023 states source temperature 48.8°C. · 1 visitor, Jun 2026
- Bath temperature: Reviewers consistently report 46–50°C water temperature; official analysis shows source at 48.8°C piped directly without cooling. · 4 visitors, Sep 2025 – Aug 2026
- pH: Official analysis cited by detailed review: pH 2.1 (strongly acidic). · 1 visitor, Jun 2026
- Free-flowing (kakenagashi): Multiple reviews confirm 100% source-fed flowing bath with no recirculation; source lies immediately adjacent. · 2 visitors, Dec 2025 – Jun 2026
Practical
What you need
Lockers
Lockers, but no locksBaskets and shoe racks available but no lockable lockers; plastic pouches for valuables can be taken into bath; reviewers advise leaving valuables in car or lodging.Reported by two visitors
Facilities
Rest area
✕ NoReported by one visitor
Restaurant
✕ NoReported by one visitor
Luggage storage
✕ NoNo large lockers or storage; reviewers advise leaving luggage in car or accommodation.Reported by two visitors
How we know this
- Lockers: Baskets and shoe racks available but no lockable lockers; plastic pouches for valuables can be taken into bath; reviewers advise leaving valuables in car or lodging. · 2 visitors, May 2026 – Jun 2026
- Rest area: Only changing room and bath space; no dedicated rest area mentioned. · 1 visitor, Jan 2026
- Restaurant: One 1-word review '' (that was delicious) appears to be misplaced or refers to food elsewhere; no restaurant confirmed at bath. · 1 visitor, Jul 2026
- Luggage storage: No large lockers or storage; reviewers advise leaving luggage in car or accommodation. · 2 visitors, May 2026 – Jun 2026
Timing
When to go
Quietest Saturday around 1:00. Busiest Wednesday around 21:00.
| 8A | 9A | 10A | 11A | 12P | 13P | 14P | 15P | 16P | 17P | 18P | 19P | 20P | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MO | |||||||||||||
| TU | |||||||||||||
| WE | |||||||||||||
| TH | |||||||||||||
| FR | |||||||||||||
| SA | |||||||||||||
| SU |
Quiet Busy
Based on Google visit patterns, not a forecast.
Weekly hours
| Day | Hours |
|---|---|
| Monday | 00:00–24:00 |
| Tuesday | 00:00–24:00 |
| Wednesday | 00:00–24:00 |
| Thursday | 00:00–24:00 |
| Friday | 00:00–24:00 |
| Saturday | 00:00–24:00 |
| Sunday | 00:00–24:00 |
Getting there
How to get there
Nearest station
Gunma-Otsu8.1 km in a straight line; bus or taxi from the station
Address
583 Kusatsu, Agatsuma District, Gunma 377-1711From the facility's listing
Show a driver
煮川乃湯（共同浴場）The name in Japanese, for a taxi or at the counter
Website
www.kusatsu.ne.jpOfficial, in Japanese
The map loads only when you ask for it and connects your browser to Google.
Nearby
Other baths close by
Find another
Not the right bath?
Where are you starting from?
More options
What matters
Contribute
Been here recently?
Help other visitors with fresh information about Niekawa-no-Yu Public Bath. Everything below is optional except the last box.
Questions
Common questions
Can I visit Niekawa-no-Yu Public Bath without staying overnight?
Multiple reviewers confirm tourists can use the bath; one states it is now open 24 hours with no restrictions for tourists since post-COVID.
How much does Niekawa-no-Yu Public Bath cost?
Consistently described as free with no admission charge; operated on voluntary donations.
Is the water free-flowing spring water?
Multiple reviews confirm 100% source-fed flowing bath with no recirculation; source lies immediately adjacent.
