Right Onsen › Kanagawa › Minamiashigara
Only Yu Hot Spring Resort
4.1★ · 1464 Google ratings · Minamiashigara, Kanagawa · モダン湯治 おんりーゆー
✓ Natural hot-spring water✓ Free-flowing source water✓ Outdoor bath✓ Rest area✓ Restaurant
Before you go
Can you bathe here?
Day visitors
✓ YesThe facility is primarily a day-use hot spring that also offers overnight stays, as described in 2026 reviews.stated on the facility's website · read 2026-09
visitors report Yes · 2 visitors · Jul 2026 – Aug 2026
visitors report Yes · 2 visitors · Jul 2026 – Aug 2026
Hours
10:00–20:00from the facility listing
Price
¥2,400Weekday admission was 2,400 yen in July 2026 and weekend admission was 2,530 yen in May 2026.stated by 2 visitors · May 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
Price
Weekday admission was 2,400 yen in July 2026 and weekend admission was 2,530 yen in May 2026.
stated by 2 visitors · May 2026 – Jul 2026The bath
What you’ll find
A quiet forest hot-spring day-use facility in South Ashigara with indoor and outdoor baths, multiple saunas, and lukewarm 38°C alkaline pools, popular for its relaxed atmosphere though admission is relatively expensive.
Outdoor bath
✓ YesMultiple reviewers from 2026 describe a forest-surrounded outdoor bath with lukewarm water around 38°C.stated by 2 visitors · Apr 2026 – Jul 2026
Sauna
✓ YesReviewers in 2026 describe two saunas, including an outdoor löyly-style sauna and an indoor standard one.stated by 2 visitors · Jul 2026 – Aug 2026
Cold bath
✓ YesReviewers noted two cold plunge baths using natural spring water, reported in 2026.stated by 2 visitors · Jul 2026 – Aug 2026
Rest area
✓ YesReviewers in 2026 describe rest areas with reclining chairs and rest rooms with beds.stated by 2 visitors · May 2026
Restaurant
✓ YesThe facility has an on-site restaurant serving meals, mentioned in multiple 2026 reviews.stated by 2 visitors · May 2026 – Jul 2026
Lodging
✓ YesThe facility offers overnight lodging in addition to day-use bathing, per 2026 reviews.stated by 2 visitors · Mar 2026 – Aug 2026
The water
Spring type
Alkaline spring (self-owned source)A 2026 review described the facility's own source as a highly alkaline hot spring known for smooth skin feel.stated by 1 visitor · May 2026
Source temperature
38°CReviewers in 2026 described the source water as lukewarm, around 38°C.stated by 2 visitors · Apr 2026 – May 2026
Bath temperature
38°CThe main outdoor bath is kept at a lukewarm temperature of about 38°C according to 2026 reviews.stated by 2 visitors · Apr 2026 – May 2026
pH
pH 9.5A 2026 review cited the facility's own source water as highly alkaline with a pH of 9.5.stated by 1 visitor · May 2026
Timing
When to go
Quietest Monday around 10:00; busiest Sunday around 17:00. Measured by Google over past visits, not a forecast.
| 8A | 9A | 10A | 11A | 12P | 13P | 14P | 15P | 16P | 17P | 18P | 19P | 20P | |
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Quiet Busy
| Day | Hours |
|---|---|
| Monday | 10:00–20:00 |
| 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 |
Practical
Plan your visit
📍 1520-1 Hiromachi, Minamiashigara, Kanagawa 250-0121
🚃 Daiyuzan station, 2.5 km
📞 +81465-72-1126
📋 Show at the counter: モダン湯治 おんりーゆー
Nearby
Other baths close by
Hakone · 4.3★
Odawara · 3.7★
Odawara · 3.8★
Hakone · 4.4★
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