Right Onsen › Gunma › Nakanojo
Shiriyaki Onsen Benten-no-Yu
4.2★ · 30 Google ratings · Nakanojo, Gunma · 日帰り温泉施設「尻焼温泉 弁天の湯」
✓ Natural hot-spring water✓ Free-flowing source water✓ Rest area
Before you go
Can you bathe here?
Day visitors
✓ YesDay-use bathhouse open roughly 12:30-19:30, closed Mondays.stated by 2 visitors · May 2024 – Nov 2024
Hours
12:30–19:30 · closed Mondayfrom the facility listing
Price
¥500Standard entry is 500 yen for non-residents; residents of the town pay 300 yen.stated by 13 visitors · May 2024 – Aug 2026
Bathing arrangement
Men and women separateMen's and women's baths are separated.stated by 2 visitors · Jul 2025 – Jun 2026
Tattoos
Not known · call aheadno policy stated in the 31 recent reviews we read or on the facility's website
The bath
What you’ll find
A small, newly built (2023) communal indoor bathhouse fed by the Shiriyaki hot spring, with hot kakenagashi water but no outdoor bath, sauna, or amenities.
Outdoor bath
NoIndoor bath only, no outdoor bath.stated by 4 visitors · Nov 2024 – Oct 2025
Indoor baths
1Facility has a single indoor tub.stated by 4 visitors · Nov 2024 – Jun 2026
Outdoor baths
0No outdoor bath exists at this facility.stated by 4 visitors · Nov 2024 – Oct 2025
Sauna
NoOne reviewer notes there is no sauna.stated by 1 visitor · Nov 2024
Rest area
✓ YesThere is a small rest area with sofas/chairs before the changing room.stated by 3 visitors · Nov 2024 – Dec 2025
Restaurant
NoNo restaurant or food service on site.stated by 2 visitors · Apr 2024 – Nov 2024
The water
Free-flowing (kakenagashi)
✓ YesMultiple reviewers, including one citing staff, describe the water as genuine kakenagashi (source-fed, overflowing).stated by 4 visitors · Jul 2025 – Oct 2025
Spring type
Sodium-calcium sulfate-chloride (weakly alkaline)Water is classified as a sodium-calcium sulfate-chloride, weakly alkaline hot spring.stated by 2 visitors · Apr 2024 – Sep 2025
Source temperature
50°CStaff and reviewers put the source temperature at roughly 50C (slightly above or below by different accounts).stated by 3 visitors · Jul 2025 – Mar 2026
Bath temperature
43°CMost reviewers measure the bath at 43C, though a few give slightly different readings from 42-45C.stated by 6 visitors · May 2024 – May 2026
Practical
What to bring
Soap & shampoo
Not provided — bring your ownNo shampoo or soap provided in the bathing area; bring your own or buy a small set at the counter for 50 yen.stated by 13 visitors · Mar 2024 – Aug 2026
Lockers
✓ FreeLockers use a free key, no coin deposit required.stated by 4 visitors · Nov 2024 – Jun 2026
Hair dryer
✓ YesHair dryers are available in the changing room.stated by 2 visitors · Nov 2024
Guide
What visitors add
Price
Admission for visitors from outside the town is 500 yen, reported consistently by at least eight reviewers from 2024 through Aug 2026; one reviewer adds that town residents pay 300 yen, and one reports the 500 yen covers 2 hours (550 yen for 3 hours).
stated by 8 visitors · May 2024 – Aug 2026The water
The bath is hot: six reviewers report the tub at about 43 degrees C, one measured 44 degrees C, and one about 45 degrees C. Two reviewers note it may be too hot for children.
stated by 8 visitors · May 2024 – May 2026Outdoor bath & sauna
There is no outdoor bath (rotenburo) and no sauna — indoor bath only; at least five reviewers state this explicitly. The single indoor tub is small: four reviewers say it fits roughly 4-5 people.
stated by 7 visitors · Apr 2024 – Jun 2026The water
One reviewer gives the spring classification as sodium-calcium sulfate-chloride spring (hypotonic, weakly alkaline, high-temperature); another calls it a sodium sulfate-chloride spring. At least four reviewers describe the water as colorless/transparent.
stated by 6 visitors · Apr 2024 – Oct 2025Water handling
Three reviewers describe the water as gensen kakenagashi (free-flowing from the source); one of them says the receptionist told them the water is piped from Shiriyaki Onsen and arrives at about 50 degrees C. Two further reviewers describe the tub visibly overflowing.
stated by 5 visitors · Jul 2025 – Jun 2026Towels, soap & lockers
Four reviewers report free key lockers in the changing room (no coin needed); one reviewer from Nov 2024 conflicts, saying there is no valuables box. Two reviewers mention a hair dryer is available.
stated by 5 visitors · Nov 2024 – Jun 2026Timing
When to go
| Day | Hours |
|---|---|
| Monday | Closed |
| Tuesday | 12:30–19:30 |
| Wednesday | 12:30–19:30 |
| Thursday | 12:30–19:30 |
| Friday | 12:30–19:30 |
| Saturday | 12:30–19:30 |
| Sunday | 12:30–19:30 |
Closed Monday.
Practical
Plan your visit
📍 1573-3 Iriyama, Nakanojo, Agatsuma District, Gunma 377-1701
🚃 Gunma-Otsu station, 10.4 km
📞 +81279-95-5020
📋 Show at the counter: 日帰り温泉施設「尻焼温泉 弁天の湯」
Nearby
Other baths close by
Nakanojo · 4.0★
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