Susobana Gorge Natural Hot Spring
TypeNatural Hot Spring
A brown sodium-chloride hot spring containing salts. It has strong heat-retention properties and leaves the skin feeling moist and smooth after bathing.
Spectacular Susobana Gorge views and an authentic Finnish-style sauna
Nagano Nagano City
Located just a few minutes' drive from Nagano Station, Susobana Gorge Natural Hot Spring Inn Uruoikan is a day-use hot spring facility where you can enjoy spectacular views of Susobana Gorge from an outdoor open-air bath fed by brown free-flowing source water. The facility features a spacious, authentic Finnish-style sauna and a cold plunge bath supplied with groundwater, and sauna enthusiasts will be very satisfied, with daily staff-led löyly events held on the men's side.
TypeNatural Hot Spring
A brown sodium-chloride hot spring containing salts. It has strong heat-retention properties and leaves the skin feeling moist and smooth after bathing.
Sauna TypeDry Sauna
Stove Typeelectric
Capacity22people
A spacious dry sauna that can accommodate more than 20 people. On the men's side, staff-led löyly events are held at 18:30 on weekdays and at 12:00 and 18:00 on Saturdays, Sundays and public holidays.
Water QualityNatural Water (Groundwater, Spring, etc.)
Capacity6people
A cold plunge bath using pumped-up groundwater. Water temperature is 16–18°C, and the bath has substantial depth, providing a pleasant tightening sensation after the sauna.
Closed Days: None
98 Tsumashina, Minaminagano, Nagano City, Nagano Prefecture 380-0872, Japan
Gender Access
Gender Separated

Curated by an expert who visits onsen and sauna facilities every day and has explored 300+ locations — only facilities confirmed to be truly exceptional are featured.
Learn more
Spectacular Susobana Gorge views and an authentic Finnish-style sauna
Nagano Nagano City
Located just a few minutes' drive from Nagano Station, Susobana Gorge Natural Hot Spring Inn Uruoikan is a day-use hot spring facility where you can enjoy spectacular views of Susobana Gorge from an outdoor open-air bath fed by brown free-flowing source water. The facility features a spacious, authentic Finnish-style sauna and a cold plunge bath supplied with groundwater, and sauna enthusiasts will be very satisfied, with daily staff-led löyly events held on the men's side.
TypeNatural Hot Spring
A brown sodium-chloride hot spring containing salts. It has strong heat-retention properties and leaves the skin feeling moist and smooth after bathing.
Sauna TypeDry Sauna
Stove Typeelectric
Capacity22people
A spacious dry sauna that can accommodate more than 20 people. On the men's side, staff-led löyly events are held at 18:30 on weekdays and at 12:00 and 18:00 on Saturdays, Sundays and public holidays.
Water QualityNatural Water (Groundwater, Spring, etc.)
Capacity6people
A cold plunge bath using pumped-up groundwater. Water temperature is 16–18°C, and the bath has substantial depth, providing a pleasant tightening sensation after the sauna.
Closed Days: None
98 Tsumashina, Minaminagano, Nagano City, Nagano Prefecture 380-0872, Japan
Gender Access
Gender Separated

Curated by an expert who visits onsen and sauna facilities every day and has explored 300+ locations — only facilities confirmed to be truly exceptional are featured.
Learn more