Right Onsen › Gunma › Numata
Nangoonsen Shakunage Hot Spring
4.1★ · 1642 Google ratings · Numata, Gunma · 南郷温泉 しゃくなげの湯
✓ 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
✓ Yesstated on the facility's website · read 2026-09
Hours
10:00–20:00 · closed Thursdayfrom the facility listing
Price
¥800Two reviewers give the adult entry price as 800 yen; one other mentions a confusing 700 yen with a discount that didn't add up.stated by 2 visitors · Jun 2026 – Jul 2026
Private bath
Yes, by reservationA private/reserved bath exists; reviewers recommend phoning ahead as reservations can be limited.stated by 2 visitors · Aug 2026
Tattoos
Not known · call aheadno policy stated in the 29 recent reviews we read or on the facility's website
The bath
What you’ll find
A mountain-forest day-use onsen with sulfur-scented alkaline water, kakenagashi indoor and outdoor baths, sauna and cold bath, though several reviewers note cleaning happens only weekly.
Outdoor bath
✓ YesMultiple reviewers describe two outdoor baths of different sizes.stated by 6 visitors · Jun 2026 – Aug 2026
Indoor baths
2Two indoor baths (large and small) are described consistently.stated by 2 visitors · Jun 2026 – Aug 2026
Outdoor baths
2Two outdoor baths (large and small) are described consistently.stated by 2 visitors · Jun 2026 – Aug 2026
Sauna
✓ YesSauna is confirmed by several reviewers, though one notes it gets very crowded (5 people packed in).stated by 4 visitors · Jun 2026 – Jul 2026
Cold bath
✓ YesA cold plunge bath (mizuburo) is present alongside the sauna.stated by 2 visitors · Jun 2026 – Aug 2026
Rest area
✓ YesA tatami rest area is described where visitors lie down and relax.stated by 2 visitors · Jun 2026 – Aug 2026
Restaurant
✓ YesAn on-site restaurant/food court exists; one reviewer noted the menu recently became simpler and cafeteria-style.stated by 3 visitors · Jun 2026 – Jul 2026
The water
Free-flowing (kakenagashi)
✓ YesWidely described as source-fed kakenagashi (except the cold bath), including one explicit '100%' claim.stated by 7 visitors · Jun 2026 – Aug 2026
Spring type
Sulfur, alkalineReviewers repeatedly note a faint sulfur smell and describe the water as alkaline with a smooth, skin-softening feel.stated by 5 visitors · Jul 2026 – Aug 2026
Bath temperature
41°CTwo separate detailed reviews both measure the bath at roughly 41-42°C.stated by 2 visitors · Jun 2026
Guide
What visitors add
The water
The water is colorless with a faint sulfur smell (noted in 5 reviews, May–Aug 2026); one reviewer identifies it as 100% source alkaline water, and slippery/smooth skin feel is reported in 3 reviews.
stated by 8 visitors · May 2026 – Aug 2026Water handling
Reviewers consistently describe the baths as 100% free-flowing source water (kakenagashi); one detailed reviewer specifies that everything except the cold plunge is kakenagashi, and another that both indoor and outdoor baths are kakenagashi.
stated by 8 visitors · May 2026 – Aug 2026Outdoor bath & sauna
There are two outdoor baths (one large rock bath holding ~15 people, one smaller and slightly hotter per one detailed reviewer), plus a sauna and cold plunge; outdoor baths and sauna are each mentioned by at least 5 distinct reviewers.
stated by 8 visitors · Jun 2026 – Aug 2026Price
Admission reports vary: two reviewers (June–July 2026) paid 800 yen; one reviewer (July 2026) cites a 700-yen base reduced to 635 yen with a 10% discount ticket; one reviewer explains the fee depends on length of stay with a minimum 3-hour tier; one reviewer feels the price rises with each visit, while two others call it cheap.
stated by 7 visitors · May 2026 – Aug 2026The water
Two reviewers independently estimate bath temperature at about 41–42°C; one reviewer (July 2026) feels the water has changed from before, with less sulfur smell than previously.
stated by 3 visitors · Jun 2026 – Jul 2026Private bath
A private reservable bath (kashikiri) exists; one reviewer advises reserving it by phone to avoid waiting, and another reviewer says the private-room bath used to have reservation restrictions and recommends confirming current rules.
stated by 2 visitors · Aug 2026Timing
When to go
Quietest Monday around 10:00; busiest Sunday around 16:00. Measured by Google over past visits, not a forecast.
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Quiet Busy
| Day | Hours |
|---|---|
| Monday | 10:00–20:00 |
| Tuesday | 10:00–20:00 |
| Wednesday | 10:00–20:00 |
| Thursday | Closed |
| Friday | 10:00–20:00 |
| Saturday | 10:00–21:00 |
| Sunday | 10:00–21:00 |
Closed Thursday.
Practical
Plan your visit
📍 100番地 Tonemachi Hikagenango, Numata, Gunma 378-0313
🚃 Iwamoto station, 12.6 km
📞 +81278-20-0011
📋 Show at the counter: 南郷温泉 しゃくなげの湯
Nearby
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