Right Onsen › Gunma › Minakami
Minakami Town Onsen Mitsumine-no-Yu
4.1★ · 346 Google ratings · Minakami, Gunma · みなかみ町営温泉 三峰の湯
✓ Free-flowing source water✓ Outdoor bath✓ Rest area
Before you go
Can you bathe here?
Price
¥400Non-resident admission was long 400 yen (300 yen for town residents) but jumped to 600 yen (400 for residents) starting July 2026; one reviewer speculates without confirmation that this followed a Legionella bacteria issue.stated by 12 visitors · Oct 2025 – Jul 2026
Hours
10:00–19:30from the facility listing
Tattoos
Not known · call aheadno policy stated in the 34 recent reviews we read or on the facility's website
Watch out
Price
Non-resident admission was long 400 yen (300 yen for town residents) but jumped to 600 yen (400 for residents) starting July 2026; one reviewer speculates without confirmation that this followed a Legionella bacteria issue.
stated by 12 visitors · Oct 2025 – Jul 2026Outdoor bath
A rock outdoor bath is available; bear-warning signs are posted right beside it given the mountain surroundings.
stated by 10 visitors · Oct 2025 – Jul 2026The bath
What you’ll find
A beloved, no-frills town-run mountain bathhouse with a genuinely hot source-fed alkaline spring (also lightly chlorinated), one indoor and one outdoor tub with bear-warning signs posted right by the open-air bath, and a July 2026 price jump that one reviewer speculates followed a Legionella scare.
Outdoor bath
✓ YesA rock outdoor bath is available; bear-warning signs are posted right beside it given the mountain surroundings.stated by 10 visitors · Oct 2025 – Jul 2026
Indoor baths
1There is one indoor bath tub (and one outdoor tub).stated by 2 visitors · Apr 2026 – Jun 2026
Outdoor baths
1There is one outdoor bath tub.stated by 2 visitors · Apr 2026 – Jun 2026
Sauna
NoNo sauna is available.stated by 1 visitor · Apr 2026
View
MountainThe outdoor bath faces an open mountain valley and forest, with wind and scenery as part of the experience.stated by 3 visitors · Dec 2025 – Apr 2026
Rest area
✓ YesA small air-conditioned rest room (roughly 10-12 tatami mats) with vending machines is available.stated by 2 visitors · Apr 2026 – May 2026
Restaurant
NoThere is no restaurant, only a beverage vending machine.stated by 1 visitor · Nov 2025
The water
Free-flowing (kakenagashi)
✓ YesGenuinely source-fed (kakenagashi), with no added water and no artificial heating.stated by 6 visitors · Dec 2025 – Jun 2026
Spring type
Alkaline simple (sodium bicarbonate)Classified as an alkaline simple hot spring, rich in sodium and bicarbonate.stated by 2 visitors · Dec 2025 – Apr 2026
Source temperature
50°CSource temperature is 50C.stated by 1 visitor · Apr 2026
Bath temperature
43°CThe indoor bath runs quite hot (around 43-44.5C), with the outdoor bath set a few degrees cooler (roughly 40-42.5C).stated by 4 visitors · Dec 2025 – Jul 2026
Heated
NoThe spring is not artificially heated; it's naturally hot at the source.stated by 2 visitors · May 2026 – Jun 2026
Water added
NoNo extra water is added to the spring.stated by 2 visitors · May 2026 – Jun 2026
Chlorinated
✓ YesA posted notice confirms disinfectant is added (so drinking the water is prohibited), detectable as a faint smell, even though the bath is otherwise source-fed.stated by 3 visitors · Nov 2025 – Apr 2026
Practical
What to bring
Soap & shampoo
✓ ProvidedShampoo and body soap are consistently provided, though one visit found a posted notice saying bar soap had been removed, while other reviewers still report soap present.stated by 6 visitors · Dec 2025 – Jun 2026
Lockers
✓ FreeBoth shoe lockers and valuables lockers are free and lockable.stated by 4 visitors · Oct 2025 – Jun 2026
Hair dryer
✓ FreeA hair dryer is free to use, though typically only one unit is available.stated by 3 visitors · Oct 2025 – Jun 2026
Guide
What visitors add
Towels, soap & lockers
Rinse-in shampoo and body soap are provided (at least four distinct reviews, Oct 2025–Jun 2026); one reviewer (Apr 2026) reports bar soap was removed per a posted notice. Free keyed valuables lockers exist (at least three distinct reviews; one locates them in the rest area) plus a free hair dryer (two reviewers, one counting a single dryer). Showers are scarce: reviews through Oct 2025 report only one shower; by Apr–May 2026 two showers plus a tap-only station are reported (one May 2026 reviewer explicitly notes the increase from one to two). Most reviewers count 3 wash stations; one (Apr 2026) says 5–6.
stated by 11 visitors · Oct 2025 – Jun 2026Price
Admission was 300 yen for town residents / 400 yen for non-residents (two distinct reviews state the split; at least five other distinct reviews from Oct 2025–May 2026 paid 400 yen), and was raised from July 2026 to 400 yen residents / 600 yen non-residents (two distinct reviews). One reviewer (Mar 2026) reports towels sold for 300 yen.
stated by 9 visitors · Oct 2025 – Jul 2026The water
Colorless, nearly odorless alkaline simple spring (one reviewer read the analysis: alkaline simple onsen rich in sodium and hydrogen carbonate) with a markedly slippery, lotion-like skin feel reported by well over five distinct reviews (Dec 2025–Aug 2026). It runs hot: one reviewer reports a 50°C source; posted limits per another are inner bath ≤44.5°C and rotenburo ≤42.5°C, with the inner bath consistently reported hotter than the outdoor bath.
stated by 8 visitors · Dec 2025 – Aug 2026Outdoor bath & sauna
There is one inner bath and one open-air rock bath facing the forest/valley (at least five distinct reviews); there is no sauna (one reviewer states this explicitly). 'Beware of bears' notices are posted at the rotenburo — reported by at least five distinct reviews (Jan–Jul 2026).
stated by 8 visitors · Oct 2025 – Jul 2026Water handling
The bath is kakenagashi without added water or heating (at least four distinct reviews, Dec 2025–Jun 2026); however, three distinct reviewers note the water is chlorinated/disinfected, and one reports a posted notice that drinking the water is prohibited because of the disinfectant.
stated by 7 visitors · Oct 2025 – Jun 2026Day-use visits
A town-run day-use bath with irregular closing days — one reviewer (May 2026) found it closed on a previous visit and advises checking before making the trip into the mountains; no reviewer states opening hours. One reviewer (Jun 2026) warns it gets very crowded after 5 pm with locals.
stated by 3 visitors · May 2026 – Aug 2026Timing
When to go
Quietest Thursday around 10:00; busiest Saturday around 18:00. Measured by Google over past visits, not a forecast.
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Quiet Busy
| Day | Hours |
|---|---|
| Monday | 10:00–19:30 |
| Tuesday | 10:00–19:30 |
| Wednesday | 10:00–19:30 |
| Thursday | 10:00–19:30 |
| Friday | 10:00–19:30 |
| Saturday | 10:00–19:30 |
| Sunday | 10:00–19:30 |
Practical
Plan your visit
📍 2265 Gokan, Minakami, Tone District, Gunma 379-1305
🚃 Gokan station, 2.2 km
📞 +81278-62-1022
📋 Show at the counter: みなかみ町営温泉 三峰の湯
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