Right Onsen › Gunma › Shibukawa
Kogane no Yu
3.7★ · 1354 Google ratings · Shibukawa, Gunma · 黄金の湯館
✓ Natural hot-spring water✓ Free-flowing source water✓ Outdoor bath✓ Rest area
Before you go
Can you bathe here?
Tattoos
Private bath onlystated on the facility's website · read 2026-09
Hours
10:00–22:00from the facility listing
The bath
What you’ll find
The day-use bathhouse of the Ikaho Grand Hotel, famous for Ikaho's iron-rich golden/brown spring, with well-stocked amenities, a sauna (but no cold plunge) and an unusually large manga/lounge rest area; despite marketing itself as kakenagashi, staff have confirmed chlorine is added, and hygiene complaints (loose hair in the changing room and bath) recur.
Outdoor bath
✓ YesAn outdoor bath with a garden seating area is available.stated by 4 visitors · Apr 2026
Sauna
✓ YesA small sauna is available.stated by 5 visitors · Mar 2026 – Apr 2026
Cold bath
NoThere is no cold plunge bath.stated by 2 visitors · Mar 2026 – Apr 2026
Rest area
✓ YesA large, well-equipped rest area with manga corner and reclining chairs exists, though one reviewer on a crowded evening felt there was nowhere to linger.stated by 4 visitors · Mar 2026 – May 2026
Restaurant
NoThere is no restaurant, only vending machines and shaved ice, though one review separately mentions a buffet (likely a bundled online-booking meal plan rather than a walk-in restaurant).stated by 1 visitor · May 2026
The water
Free-flowing (kakenagashi)
✓ YesThe facility is marketed and generally experienced as kakenagashi, though staff have separately confirmed chlorine is also added to the bath.stated by 2 visitors · Mar 2026 – Apr 2026
Spring type
Iron-rich golden/brown (Ikaho Kogane-no-yu)This is Ikaho's signature iron-rich, golden-brown spring water, known to stain towels.stated by 4 visitors · Apr 2026 – May 2026
Practical
What to bring
Towels
Rental availableTowels can be rented on-site.stated by 2 visitors · Apr 2026 – May 2026
Soap & shampoo
✓ ProvidedAmenities are unusually well-stocked, including horse-oil shampoo.stated by 3 visitors · Apr 2026
Lockers
✓ Coin returnedLockers use a refundable 100 yen coin system.stated by 2 visitors · Apr 2026
Guide
What visitors add
Price
One Mar 2026 reviewer states day-use admission is 743 yen. Perceived value is split: three reviews call it cheap/reasonable while one calls day-use expensive for what it is, and one family (2 adults + toddler with rented bath towels) paid over 4,000 yen. One Apr 2026 reviewer reports a renovation was imminent and speculates prices may rise; another found that of two advertised nifty-onsen coupons only the 110-yen-off one was accepted.
stated by 6 visitors · Feb 2026 – May 2026The water
The bath uses Ikaho's signature 'Kogane no yu' (golden) spring - brown/tea-colored water noted by at least five reviews. One reviewer says it leaves skin smooth, two say it warms deeply (one warns against soaking too long), and one advises showering afterward because the muddy-colored water stains towels brown.
stated by 5 visitors · Mar 2026 – May 2026Outdoor bath & sauna
Has an open-air bath (at least four reviews, one praising its openness and garden with chairs for cooling off) and a sauna (at least five reviews) - but the sauna is small per one reviewer and there is NO cold-water bath (two reviews state this explicitly). One reviewer felt the sauna ran cooler than its thermometer reading. The women's side has about 8 showers and two large tubs plus the sauna per one review.
stated by 5 visitors · Mar 2026 – May 2026Towels, soap & lockers
Amenities are unusually complete (four reviews): body soap, shampoo, conditioner, and shaving foam; one reviewer notes the shampoo is horse-oil based with a seasonal sakura variant, and another praises a drinking fountain in the changing room. Lockers are 100-yen coin-return type (two reviews). Towels and bath towels can be rented, enabling empty-handed visits (two reviews).
stated by 4 visitors · Mar 2026 – May 2026Staffing
Staffed day-use facility attached to Ikaho Grand Hotel (one review); reception answers questions (e.g. confirmed chlorination to one reviewer). Two 1-star reviews complain cleaning staff do not patrol regularly - hair and debris in the changing room and floating in the tubs.
stated by 4 visitors · Mar 2026 – May 2026Water handling
Conflicting evidence: two reviews describe the Kogane no yu as kakenagashi, but one Apr 2026 reviewer (1-star) reports heavy chlorine in the tubs and says reception confirmed chlorine is added. Both could be true (kakenagashi source with chlorination), but reviews alone cannot resolve it - 2 mentions of kakenagashi vs 1 confirmed chlorination account.
stated by 3 visitors · Mar 2026 – Apr 2026Timing
When to go
Quietest Tuesday around 21:00; busiest Saturday around 14:00. Measured by Google over past visits, not a forecast.
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Quiet Busy
| Day | Hours |
|---|---|
| Monday | 10:00–22:00 |
| Tuesday | 10:00–22:00 |
| Wednesday | 10:00–22:00 |
| Thursday | 10:00–22:00 |
| Friday | 10:00–22:00 |
| Saturday | 10:00–22:00 |
| Sunday | 10:00–22:00 |
Practical
Plan your visit
📍 550 Ikahomachi Ikaho, Shibukawa, Gunma 377-0102
🚃 Ubashima station, 5.4 km
📞 +81279-30-4100
📋 Show at the counter: 黄金の湯館
Nearby
Other baths close by
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Shibukawa · 4.0★
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