Right Onsen › Gunma › Shibukawa
Onogami Onsen Hatha no yu
4.1★ · 1660 Google ratings · Shibukawa, Gunma · 小野上温泉 ハタの湯
✓ Private day-use bath✓ Natural hot-spring water✓ Free-flowing source water✓ Outdoor bath✓ Rest area✓ Restaurant
Before you go
Can you bathe here?
Day visitors
✓ YesStandard day-use bathing facility, though one visitor found it closed unexpectedly with no notice on its website or Instagram.stated on the facility's website · read 2026-09
visitors report Yes · 2 visitors · Jul 2026 – Aug 2026
visitors report Yes · 2 visitors · Jul 2026 – Aug 2026
Hours
09:00–21:00from the facility listing
Price
¥410Standard adult entry is 410 yen (some promos bring it down to 310 yen).stated by 4 visitors · Jul 2026 – Aug 2026
Private bath
✓ YesA private/reservable room and bath is available in addition to the main baths.stated by 2 visitors · Aug 2026
Time limit
2 hoursEntry is sold as a 2-hour block.stated by 3 visitors · Jul 2026 – Aug 2026
Tattoos
Not known · call aheadno policy stated in the 27 recent reviews we read or on the facility's website
The bath
What you’ll find
A cheap, popular day-use bathhouse right by Onogami Onsen station with famously slippery alkaline sodium-chloride water, two indoor tubs, an outdoor bath, a dry sauna, and a private bath option, though the water is circulated and chlorinated rather than flowing straight from the source.
Outdoor bath
✓ YesOne outdoor bath alongside two indoor tubs.stated by 4 visitors · Jul 2026 – Aug 2026
Indoor baths
2Two indoor tubs at different temperatures.stated by 3 visitors · Jul 2026 – Aug 2026
Outdoor baths
1One outdoor bath.stated by 2 visitors · Jul 2026 – Aug 2026
Sauna
✓ YesA dry sauna running roughly high-80s C, holding up to about 10 people.stated by 3 visitors · Jul 2026 – Aug 2026
Cold bath
✓ YesA cold plunge bath accompanies the sauna.stated by 2 visitors · Jul 2026 – Aug 2026
Rest area
✓ YesSpacious rest area with massage chairs.stated by 3 visitors · Aug 2026
Restaurant
✓ YesAn in-house cafe/cafeteria serves lunch, though one evening visitor found most food already sold out.stated by 3 visitors · Jun 2026 – Aug 2026
The water
Spring type
Sodium chloride, alkalineA sodium-chloride alkaline hot spring, known for its silky, skin-softening feel.stated by 1 visitor · Jul 2026
pH
pH 8.9Strongly alkaline water, cited around pH 8.9-9.0.stated by 2 visitors · Jul 2026
Practical
What to bring
Lockers
✓ Coin returnedShoe and clothing lockers use a 100-yen deposit-and-return system.stated by 2 visitors · Jul 2026 – Aug 2026
Guide
What visitors add
The water
The water's slippery, skin-smoothing feel is the facility's signature: at least eight reviewers (Jun-Aug 2026) describe it as toro-toro / nuru-nuru / tsuru-tsuru alkaline water. One dissenting reviewer found it unremarkable ('not toro-toro, ordinary') while citing the analysis board: sodium-chloride spring, hypotonic, alkaline, high-temperature, pH 9.0; a second reviewer reports pH 8.9.
stated by 9 visitors · Jun 2026 – Aug 2026Outdoor bath & sauna
Full bath lineup confirmed by multiple reviewers: two indoor tubs, one outdoor bath (three reviewers; one calls the rotenburo area fairly spacious), a dry sauna (four reviewers) and a cold-water bath (two reviewers). Sauna size reports differ: one reviewer says about 5 people fill it (roughly high-80s degrees C), another says max around 10. One reviewer also mentions a free outdoor foot bath.
stated by 7 visitors · Jul 2026 – Aug 2026Towels, soap & lockers
Shoe cupboards and changing-room lockers are the 100-yen coin-return type — two reviewers confirm (one notes two change machines at the entrance; the other did not realize the coin is returned and had a bad front-desk experience over it). One reviewer mentions free hair dryers.
stated by 3 visitors · Jul 2026 – Aug 2026Private bath
One reviewer (Aug 2026) states a kashikiri (private rental) bath exists; a second reviewer separately praises renting a private room. Details (price, booking) are not given in reviews.
stated by 2 visitors · Aug 2026The water
One reviewer (Jul 2026) gives indoor tub temperatures: a hotter tub at 43 degrees C and a cooler one at 41.5 degrees C; a second reviewer confirms the two indoor tubs are kept at different temperatures.
stated by 2 visitors · Jul 2026 – Aug 2026Water handling
One reviewer (Jul 2026) reports the water is recirculated and disinfected with a notably strong chlorine smell, while retaining its slippery alkaline feel; another reviewer says they could not tell whether it is kakenagashi. No reviewer claims it is kakenagashi.
stated by 2 visitors · Jul 2026Timing
When to go
Quietest Friday around 9:00; busiest Sunday around 17:00. Measured by Google over past visits, not a forecast.
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Quiet Busy
| Day | Hours |
|---|---|
| Monday | 09:00–21:00 |
| Tuesday | 09:00–21:00 |
| Wednesday | 09:00–21:00 |
| Thursday | 09:00–21:00 |
| Friday | 09:00–21:00 |
| Saturday | 09:00–21:00 |
| Sunday | 09:00–21:00 |
Practical
Plan your visit
📍 305-2 Murakami, Shibukawa, Gunma 377-0311
🚃 Onogami-Onsen station, 0.1 km
📞 +81279-59-2611
📋 Show at the counter: 小野上温泉 ハタの湯
Nearby
Other baths close by
Shibukawa · 3.9★
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