Right Onsen › Gunma › Tomioka
Myōgi Fureai Plaza / Myōgi Onsen Hot Spring ‘Momiji no Yu’
3.9★ · 973 Google ratings · Tomioka, Gunma · 妙義ふれあいプラザ 妙義温泉｢もみじの湯｣
✓ Natural hot-spring water✓ Rest area✓ Restaurant
Before you go
Can you bathe here?
Price
¥620Adult 3-hour admission is most often quoted at 620 yen, though a couple of reviews mention 600 or 650 yen instead.stated by 4 visitors · Feb 2026 – Aug 2026
Hours
10:00–20:00 · closed Mondayfrom the facility listing
Time limit
3 hoursEntry is capped at a 3-hour stay, which one reviewer flagged as unsuited to long, leisurely visits.stated by 4 visitors · Apr 2026 – Jun 2026
Tattoos
Not known · call aheadno policy stated in the 36 recent reviews we read or on the facility's website
Watch out
Hair dryer
High-end Dyson/ReFa hair dryers are available, but all are paid (5 minutes for 100 yen) with no free option.
stated by 5 visitors · Feb 2026 – Aug 2026Outdoor bath
The outdoor bath has a scenic view and reopened around June 2026 after an extended water-shortage closure that ran through spring 2026 — worth confirming it is currently open before visiting.
stated by 4 visitors · Jun 2026 – Aug 2026Time limit
Entry is capped at a 3-hour stay, which one reviewer flagged as unsuited to long, leisurely visits.
stated by 4 visitors · Apr 2026 – Jun 2026The bath
What you’ll find
A hilltop day-use bathhouse below Mt. Myogi with sweeping mountain and Kanto-plain views from its outdoor bath, trucked-in heated/recirculated mineral water, a sauna, and a well-liked restaurant, though the outdoor bath has a history of shutting down during water shortages.
Outdoor bath
✓ YesThe outdoor bath has a scenic view and reopened around June 2026 after an extended water-shortage closure that ran through spring 2026 — worth confirming it is currently open before visiting.stated by 4 visitors · Jun 2026 – Aug 2026
Indoor baths
2There are two indoor tubs, a large one and a small one.stated by 2 visitors · May 2026
Sauna
✓ YesA small sauna (fits about 5-8 people) is available and generally well-liked.stated by 4 visitors · Feb 2026 – May 2026
Cold bath
✓ YesA cold plunge bath is available alongside the sauna.stated by 1 visitor · May 2026
View
MountainThe bath, especially the outdoor one, offers wide views of Mt. Myogi and the Kanto plain.stated by 4 visitors · Feb 2026 – Jul 2026
Rest area
✓ YesSeveral large rest rooms/lounges are available for relaxing after bathing.stated by 4 visitors · Apr 2026 – Jul 2026
Restaurant
✓ YesThe on-site restaurant offers a varied, well-liked menu of set meals, ramen, and curry.stated by 5 visitors · May 2026 – Aug 2026
The water
Spring type
Sodium bicarbonate-chloride cold mineral spring (weakly alkaline)The posted spring type is a sodium bicarbonate-chloride cold mineral spring, weakly alkaline.stated by 1 visitor · Jun 2026
Bath temperature
39°CThe indoor baths run around 38-40C, consistently described as on the lukewarm side.stated by 3 visitors · Apr 2026 – Jun 2026
Recirculated
✓ YesThe water is run through a recirculation system rather than flowing freely.stated by 2 visitors · Mar 2026 – May 2026
Practical
What to bring
Soap & shampoo
✓ ProvidedRinse-in shampoo and body soap are provided, though one reviewer found the shampoo left hair feeling rough.stated by 3 visitors · Feb 2026 – Jun 2026
Lockers
✓ Coin returnedLockers require a 100-yen coin, which is returned after use.stated by 3 visitors · Feb 2026 – Jun 2026
Hair dryer
✓ YesHigh-end Dyson/ReFa hair dryers are available, but all are paid (5 minutes for 100 yen) with no free option.stated by 5 visitors · Feb 2026 – Aug 2026
Guide
What visitors add
Outdoor bath & sauna
IMPORTANT RECENT HISTORY: the outdoor bath was closed for months due to water shortage — reported by at least 8 distinct reviewers between late March and late May 2026 — and reopened around early June 2026 (3 reviewers confirm the reopening). The rotenburo's panoramic view of Mt. Myogi and the Kanto plain is its main draw, praised by at least 4 reviewers including one who saw the night view.
stated by 11 visitors · Mar 2026 – Aug 2026Price
Standard admission is 620 yen for 3 hours (4 distinct reviewers; one itemizes 620 yen for junior-high age and up, 400 yen for children and for age 70+); two other reviewers round it to 600 or 650 yen. During the spring 2026 outdoor-bath closure, 3 reviewers complained full price was still charged with no discount.
stated by 8 visitors · Feb 2026 – Aug 2026The water
One detailed reviewer (Jun 2026) records the source as sodium bicarbonate-chloride cold mineral spring (hypertonic, weakly alkaline) and found the bath water colorless and odorless, with the two indoor tubs at 38-39°C and 40°C; lukewarm temperatures are corroborated by 4 other reviewers (one measuring 39°C). Appearance conflicts: two reviewers found the water whitish/cloudy, versus the one who found it clear.
stated by 6 visitors · Mar 2026 – Aug 2026Towels, soap & lockers
Shampoo (rinse-in type per 2 reviewers, one disliking it) and body soap are provided (3+ reviewers). Hair dryers are paid-only — 100 yen per 5 minutes on high-end Dyson/ReFa units (at least 5 reviewers; one notes 3 units) — and two reviewers confirm you may bring your own dryer; one reviewer had never before seen a day-onsen with no free dryer.
stated by 6 visitors · Mar 2026 – Aug 2026Day-use visits
Admission is limited to a 3-hour stay (including meals), stated by 4 distinct reviewers; one reviewer complains it is unsuited to long stays; one reviewer notes it was closed on Monday.
stated by 5 visitors · Feb 2026 – Jun 2026Outdoor bath & sauna
There is a small sauna and cold plunge: capacity estimates are about 5 people (one reviewer, who found it hot but slightly sweat-smelling) and about 8 people (one reviewer); a third simply calls it small, and a fourth confirms sauna plus cold bath plus outdoor-air cooling.
stated by 4 visitors · Feb 2026 – Jun 2026Timing
When to go
Quietest Wednesday around 19:00; busiest Sunday around 16:00. Measured by Google over past visits, not a forecast.
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Quiet Busy
| Day | Hours |
|---|---|
| Monday | Closed |
| Tuesday | 10:00–20:00 |
| Wednesday | 10:00–20:00 |
| Thursday | 10:00–20:00 |
| Friday | 10:00–20:00 |
| Saturday | 10:00–20:00 |
| Sunday | 10:00–20:00 |
Closed Monday.
Practical
Plan your visit
📍 1-1 Myogimachi Myogi, Tomioka, Gunma 379-0201
🚃 Nishi-Matsuida station, 2.7 km
📞 +81274-60-7600
📋 Show at the counter: 妙義ふれあいプラザ 妙義温泉｢もみじの湯｣
Nearby
Other baths close by
Annaka · 3.8★
Shimonita · 4.2★
Annaka · 4.1★
Tomioka · 4.1★
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