Right Onsen › Gunma › Tsumagoi
Tsutsuji-no-yu
3.9★ · 831 Google ratings · Tsumagoi, Gunma · 高原の天然温泉 つつじの湯
✓ Bedrock 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
10:00–21:00 · closed Thursdayfrom the facility listing
Price
¥750Standard adult admission is ¥750 and includes the rock-bath sauna at no extra charge; one reviewer felt it should drop to ¥600 while the outdoor bath was closed.stated by 5 visitors · Feb 2026 – Jul 2026
Tattoos
Not known · call aheadno policy stated in the 38 recent reviews we read or on the facility's website
Watch out
Sauna
A sauna (including a pebble-floor variant) is present, but reviewers frequently measure it disappointingly low at 60-75C, though at least one visit found it appropriately hot.
stated by 7 visitors · Dec 2025 – Aug 2026Outdoor bath
An outdoor bath exists, but it was closed for an extended stretch (roughly January through March 2026, apparently for heating-cost/maintenance reasons) before reopening by April 2026 — worth checking current status before a visit.
stated by 6 visitors · Jan 2026 – Aug 2026Free-flowing (kakenagashi)
The cold bath is genuine source-fed flow-through water, while the indoor and outdoor hot baths are heated and circulated; a sign describing the facility as kakenagashi had reportedly been taken down as of August 2026, so the claim should be treated cautiously.
stated by 3 visitors · Jul 2026 – Aug 2026Soap & shampoo
Shampoo and body soap are provided, but the notoriously weak/inconsistent shower water pressure (complained about across roughly 10 separate reviews) makes them hard to rinse off.
stated by 2 visitors · Jul 2026 – Aug 2026The bath
What you’ll find
An aging but popular day-spa in Tsumagoi with murky brown, near-neutral spring water, a heated/circulated indoor and outdoor bath plus a genuinely source-fed cold bath, sauna, and free rock-bath sauna included in the price, seriously let down by chronically weak or non-functioning showers, a low/inconsistent sauna temperature, and an outdoor bath that is closed for extended stretches (roughly Jan-Mar 2026 for cost/maintenance reasons).
Outdoor bath
✓ YesAn outdoor bath exists, but it was closed for an extended stretch (roughly January through March 2026, apparently for heating-cost/maintenance reasons) before reopening by April 2026 — worth checking current status before a visit.stated by 6 visitors · Jan 2026 – Aug 2026
Indoor baths
1One indoor hot tub.stated by 1 visitor · Dec 2025
Sauna
✓ YesA sauna (including a pebble-floor variant) is present, but reviewers frequently measure it disappointingly low at 60-75C, though at least one visit found it appropriately hot.stated by 7 visitors · Dec 2025 – Aug 2026
Cold bath
✓ YesThe cold bath (reisen) is natural spring water, well regarded by multiple reviewers.stated by 6 visitors · Apr 2026 – Aug 2026
Rest area
✓ YesA free tatami-floored rest area is available throughout the building.stated by 4 visitors · May 2026 – Aug 2026
Restaurant
✓ YesA restaurant is on site and mostly praised (cutlet rice bowl, cabbage, home-style set meals), with recent price increases noted; one visitor had a strongly negative experience (poor ventilation, bad food) that stood out against the otherwise positive consensus.stated by 8 visitors · Dec 2025 – Jul 2026
The water
Free-flowing (kakenagashi)
PartlyThe cold bath is genuine source-fed flow-through water, while the indoor and outdoor hot baths are heated and circulated; a sign describing the facility as kakenagashi had reportedly been taken down as of August 2026, so the claim should be treated cautiously.stated by 3 visitors · Jul 2026 – Aug 2026
Spring type
Murky brown, near-neutral pHThe spring water is a genuine cloudy/murky brown color; one reviewer measured the pH as close to neutral.stated by 3 visitors · Jan 2026 – Jul 2026
Practical
What to bring
Soap & shampoo
✓ ProvidedShampoo and body soap are provided, but the notoriously weak/inconsistent shower water pressure (complained about across roughly 10 separate reviews) makes them hard to rinse off.stated by 2 visitors · Jul 2026 – Aug 2026
Guide
What visitors add
Outdoor bath & sauna
The facility has one each of indoor bath, rotenburo, sauna, cold-spring plunge, plus a bedrock-bath area (one reviewer lists them all; several others confirm individual elements, one noting a pebble-floored sauna). BUT the rotenburo was closed through winter 2026: 5 distinct reviews from late January to late March 2026 report it out of service (one blaming fuel costs), while summer 2026 reviews describe it operating again.
stated by 10 visitors · Jan 2026 – Aug 2026Towels, soap & lockers
Weak or cold showers are the facility's dominant complaint: at least 10 distinct reviews from Dec 2025 to Aug 2026 report low water pressure/volume (one estimating a third of normal pressure), showers running lukewarm or cold, or wash stations with no hot water at all; one adds hair dryers are also feeble with queues forming, and another advises moving stations since flow varies by position.
stated by 10 visitors · Dec 2025 – Aug 2026Price
Adults pay 750 yen, which includes the bedrock bath (ganbanyoku) at no extra charge: 5 distinct reviews confirm the 750-yen price and 5 distinct reviews confirm ganbanyoku is included free. One reviewer notes middle-schoolers pay the child rate; one argued the price should drop to 600 yen while the rotenburo was closed.
stated by 7 visitors · Feb 2026 – Jul 2026The water
The water is a turbid (nigori) spring: 3 reviewers describe cloudy or brown-cloudy water and one describes a near-neutral pH turning greenish; the water is opaque enough that one reviewer warns you cannot see the steps (with a protrusion on the rotenburo step that nearly tripped them). Two reviewers found the bath temperature on the cool side, and one felt the water looked somewhat dirty.
stated by 6 visitors · Dec 2025 – Aug 2026Outdoor bath & sauna
Sauna temperature is a recurring complaint: 4 distinct reviews report it running low (about 60 degrees C at opening per one, 70-ish per another, 75 per a third who suspected equipment or health-office limits, 'low temperature setting' per a fourth) and one calls it lukewarm — against a single August 2026 reviewer who found it hot and spacious.
stated by 6 visitors · Dec 2025 – Aug 2026Water handling
The hot baths are heated and recirculated/filtered because the source is low-temperature, per one July 2026 reviewer — and another noticed the 源泉かけ流し signboard has been taken down. The cold plunge, by contrast, is unheated source water: 3 distinct reviews call the cold bath genuine spring water / kakenagashi cold spring.
stated by 5 visitors · Jul 2026 – Aug 2026Timing
When to go
Quietest Wednesday around 20:00; busiest Saturday around 17:00. 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 | Closed |
| Friday | 10:00–21:00 |
| Saturday | 10:00–21:00 |
| Sunday | 10:00–21:00 |
Closed Thursday.
Practical
Plan your visit
📍 930 Tashiro, Tsumagoi, Agatsuma District, Gunma 377-1614
🚃 Omae station, 6.7 km
📞 +81279-98-0930
📋 Show at the counter: 高原の天然温泉 つつじの湯
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