Right Onsen › Gunma › Shibukawa
Kaneshimaonsen Fuki Hot Spring
4.0★ · 692 Google ratings · Shibukawa, Gunma · 金島温泉 富貴の湯(ふうきのゆ)
✓ Natural hot-spring water✓ Free-flowing source water✓ Outdoor bath✓ Rest area
Before you go
Can you bathe here?
Price
¥500Adult admission is consistently reported at 500 yen for a 2-hour visit.stated by 10 visitors · Jan 2026 – Aug 2026
Hours
10:00–21:00from the facility listing
Bathing arrangement
Men and women separateBaths are separated by gender via curtains, which occasionally swap sides.stated by 2 visitors · Jan 2026 – Aug 2026
Time limit
2 hoursEntry is limited to a 2-hour stay per visit.stated by 5 visitors · May 2026 – Aug 2026
Tattoos
Not known · call aheadno policy stated in the 32 recent reviews we read or on the facility's website
Watch out
Time limit
Entry is limited to a 2-hour stay per visit.
stated by 5 visitors · May 2026 – Aug 2026The bath
What you’ll find
A small, well-loved neighborhood bathhouse near Kaneshima station with a genuine iron-rich, slightly-heated kakenagashi spring, one indoor and one outdoor tub, friendly resident cats, and a strict 2-hour, 500-yen entry.
Outdoor bath
✓ YesThere is a small rock-style outdoor bath alongside the indoor tub.stated by 4 visitors · Jan 2026 – Aug 2026
Indoor baths
1There is a single small indoor tub.stated by 2 visitors · Mar 2026
Outdoor baths
1There is a single small outdoor tub.stated by 2 visitors · Mar 2026
Rest area
✓ YesThere is a tatami rest area with self-service cushions and a vending machine.stated by 4 visitors · Jan 2026 – Jul 2026
The water
Free-flowing (kakenagashi)
✓ YesThe bath runs on a genuine kakenagashi (free-flowing) iron-rich spring, heated but not diluted or recirculated.stated by 6 visitors · Jan 2026 – Aug 2026
Spring type
Calcium-sodium chloride (iron-rich)The spring is a calcium-sodium chloride type with a strong iron smell and slightly cloudy color.stated by 3 visitors · Mar 2026 – Aug 2026
Source temperature
33.1°CThe natural spring source measures 33.1C before heating.stated by 2 visitors · Mar 2026 – May 2026
Bath temperature
41°CThe indoor bath typically runs about 41-42C; the outdoor bath is slightly cooler (around 40C), though one visit found it unusually hot.stated by 3 visitors · Jan 2026 – Jul 2026
pH
pH 6.8The posted spring analysis lists a near-neutral pH of 6.8.stated by 2 visitors · Feb 2026 – Mar 2026
Heated
✓ YesThe 33C source is heated roughly 9-10C before flowing into the baths.stated by 3 visitors · Jan 2026 – May 2026
Practical
What to bring
Soap & shampoo
✓ ProvidedShampoo and body soap are provided at every wash station.stated by 5 visitors · Mar 2026 – Aug 2026
Lockers
✓ Coin returnedChanging-room lockers use a coin-return (100 yen) system.stated by 4 visitors · Jan 2026 – Aug 2026
Hair dryer
✓ YesTwo free hair dryers are provided at the sink area.stated by 4 visitors · Jan 2026 – Jul 2026
Guide
What visitors add
Price
Adult admission is 500 yen for a 2-hour session — stated by at least eight reviewers in 2026; one itemizes 500 yen adult / 200 yen elementary schooler / 100 yen infant, and one mentions a 12-ticket book for 5,000 yen. Reviewers widely consider it a bargain for genuine onsen water.
stated by 8 visitors · Jan 2026 – Aug 2026The water
An iron-scented, slightly cloudy calcium-sodium chloride spring: one detailed reviewer (Mar 2026) lists source 33.1°C, pH 6.8, 160 L/min drilled self-flowing, ~2,493 mg dissolved solids, with rust-colored yu-no-hana flakes; at least six reviewers note the iron smell or taste. Two compare the water's color/smell/taste to Ikaho Onsen. A drinking fountain at the entrance lets you taste the source (three reviewers; verdicts: salty-bitter, iron-y, 'not tasty').
stated by 8 visitors · Mar 2026 – Aug 2026Water handling
Genuine kakenagashi with heating only: six reviewers call it gensen kakenagashi, and two specify the 33.1°C source is heated about 9-10°C with no added water and no recirculation/filtration. One staff-relayed note (May 2026): the natural source temperature itself sometimes runs hot.
stated by 6 visitors · Jan 2026 – Aug 2026Towels, soap & lockers
Body soap and shampoo are provided (two reviewers identify POLA / major-cosmetics-brand products; two others note it is rinse-in shampoo, one suggesting picky users bring their own), plus 2 free hair dryers, 100-yen refundable lockers, and a free water server (two reviewers) / tea dispenser. No reviewer mentions towel rental — no signal on towels.
stated by 6 visitors · Jan 2026 – Aug 2026Day-use visits
Day-use only, on a 2-hour system (five reviewers; one describes receiving a numbered tag at entry). Capacity is limited: one reviewer says only about 20 people per gender fit; a party of five (Apr 2026) says they were turned away being told only 3 could enter. One Monday visitor arrived at 10:00 to find 4-5 people already waiting before opening. No reviewer states full opening hours.
stated by 5 visitors · Mar 2026 – Aug 2026Outdoor bath & sauna
One small wooden indoor bath and one small covered rock-style outdoor bath; no reviewer mentions a sauna. Capacity estimates from five reviewers range 4-8 people per tub (e.g. indoor 5-6, rotenburo 6-7). Reported temperatures: indoor about 41-42°C, rotenburo about 40°C — several find the outdoor bath ideal for longer soaks.
stated by 5 visitors · Jan 2026 – Aug 2026Timing
When to go
Quietest Friday around 10:00; busiest Sunday around 18:00. Measured by Google over past visits, not a forecast.
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Quiet Busy
| Day | Hours |
|---|---|
| Monday | 10:00–21:00 |
| Tuesday | 10:00–21:00 |
| Wednesday | 10:00–21:00 |
| Thursday | 10:00–21:00 |
| Friday | 10:00–21:00 |
| Saturday | 10:00–21:00 |
| Sunday | 10:00–21:00 |
Practical
Plan your visit
📍 99-1 Kawashima, Shibukawa, Gunma 377-0025
🚃 Kanashima station, 0.2 km
📞 +81279-23-0001
📋 Show at the counter: 金島温泉 富貴の湯(ふうきのゆ)
Nearby
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