Right Onsen › Gunma › Kusatsu
Okina-no-Yu (Yubatake Source)
3.9★ · 83 Google ratings · Kusatsu, Gunma · 翁乃湯（湯畑源泉）
✓ Day visitors
Before you go
Can you bathe here?
Day visitors
Limited hoursConfirmed by recent visitor reports
Hours
00:00–24:00From the facility's listing
Closed
Cleaning 7:30–9:00 AM; resident-only 4 PM–9 AM (as of Nov 2025)Confirmed by recent visitor reports
Tattoos
? Call aheadNo policy stated in the 38 recent reviews we read
Price
Free adultConfirmed by recent visitor reports
How we know this
- Day visitors: Facility hours vary: 9am–4pm open to general visitors (2025–2026), with 4pm–9am resident-only lockdown (2025); earlier reviews (2020) reported 7:30–9:00 cleaning-only closure and free access otherwise. · 3 visitors, Oct 2020 – Nov 2025
- Closed: Cleaning closure 7:30–9:00 AM standard (2020–2021); resident-only lockdown 4 PM–9 AM implemented by Nov 2025. · 3 visitors, Oct 2020 – Nov 2025
- Price: Entry is free as of all recent reviews (2020–2026). · 3 visitors, Oct 2020 – Feb 2026
Atmosphere
The bath
What you’ll find
Free public sulfuric acid bath in Kusatsu fed by Yubatake source; simple stone pool with no shower, source-fed at ~42°C; visitors report access restrictions for non-residents vary by year.
Bath setup
Indoor baths
1.0Reported by one visitor
Outdoor bath
✕ NoReported by one visitor
Sauna
✕ NoReported by one visitor
Cold bath
✕ NoReported by one visitor
Spring water
Spring type
sulfur, aluminum, sulfate-chloride, acidicAcidic sulfur-aluminum-sulfate-chloride spring (hydrogen sulfide type, low osmotic pressure, high temperature) from Yubatake source (2024–2026).Reported by two visitors
Source temperature
52°CReported by one visitor
Bath temperature
42°CConfirmed by recent visitor reports
pH
pH 2pH 2.0, highly acidic (certified analysis, July 2023).Reported by one visitor
How we know this
- Indoor baths: One indoor bath only (2026). · 1 visitor, Feb 2026
- Outdoor bath: Pool is indoor only, stone-built and minimal (2026). · 1 visitor, Feb 2026
- Sauna: No sauna or hair dryer available (2026). · 1 visitor, Feb 2026
- Cold bath: Only one hot bath (indoor); no cold bath (2026). · 1 visitor, Feb 2026
- Spring type: Acidic sulfur-aluminum-sulfate-chloride spring (hydrogen sulfide type, low osmotic pressure, high temperature) from Yubatake source (2024–2026). · 2 visitors, Oct 2024 – Feb 2026
- Source temperature: Source temperature 52.3°C at Yubatake spring (certified analysis, July 2023). · 1 visitor, Feb 2026
- Bath temperature: Temperature reported ~42°C source; some reviewers noted it warm but tolerable for long soaks (2020–2026). · 3 visitors, Oct 2020 – Feb 2026
- pH: pH 2.0, highly acidic (certified analysis, July 2023). · 1 visitor, Feb 2026
Practical
What you need
Lockers
Lockers, but no locksReported by two visitors
Facilities
Rest area
✕ NoReported by one visitor
How we know this
- Lockers: Unlocked shelves and baskets for clothes, no lockers (2026). · 2 visitors, Feb 2026
- Rest area: Minimal facility with no rest area; only bath and dressing shelves (2026). · 1 visitor, Feb 2026
Timing
When to go
Quietest Wednesday around 0:00. Busiest Wednesday around 15:00.
| 8A | 9A | 10A | 11A | 12P | 13P | 14P | 15P | 16P | 17P | 18P | 19P | 20P | |
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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 |
Closed Cleaning 7:30–9:00 AM; resident-only 4 PM–9 AM (as of Nov 2025).
Getting there
How to get there
Nearest station
Haneo8.1 km in a straight line; bus or taxi from the station
Address
468-4 Kusatsu, Agatsuma District, Gunma 377-1711From the facility's listing
Show a driver
翁乃湯（湯畑源泉）The name in Japanese, for a taxi or at the counter
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What matters
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Questions
Common questions
Can I visit Okina-no-Yu (Yubatake Source) without staying overnight?
Facility hours vary: 9am–4pm open to general visitors (2025–2026), with 4pm–9am resident-only lockdown (2025); earlier reviews (2020) reported 7:30–9:00 cleaning-only closure and free access otherwise.
How much does Okina-no-Yu (Yubatake Source) cost?
Entry is free as of all recent reviews (2020–2026).
