Nagiso Onsen
TypeNatural Hot Spring
An alkaline simple hot spring known as Silk no Yu. It has a silky, viscous feel that leaves skin smooth after bathing, making it a skin-beautifying hot spring.
Silky skin-beautifying hot spring and an outdoor sauna with starry-sky views
Nagano Nagiso Town
Located in Nagiso, Nagano Prefecture, TAOYA Kisoji is an all-inclusive hot spring resort hotel surrounded by rich nature. Its highlight is an alkaline simple hot spring with a silky, viscous texture known as Silk no Yu. The outdoor area is equipped with a dry sauna and a cold plunge bath, and enjoying the open-air cool-down while gazing at a star-filled sky is a blissful moment.
TypeNatural Hot Spring
An alkaline simple hot spring known as Silk no Yu. It has a silky, viscous feel that leaves skin smooth after bathing, making it a skin-beautifying hot spring.
Sauna TypeDry Sauna
Stove Typeelectric
Capacity6people
A dry sauna with a convection stove installed in the outdoor area. It is set at a dry 90-95°C and comforts you with the scent of wood and healing music.
Capacity3people
A rock-style cold plunge bath in the outdoor area. The water temperature is around 17-21°C, allowing you to leisurely cool down while gazing at the stars at night.
Closed Days: None
2278 Azuma, Nagiso, Kiso District, Nagano 399-5302, 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
Silky skin-beautifying hot spring and an outdoor sauna with starry-sky views
Nagano Nagiso Town
Located in Nagiso, Nagano Prefecture, TAOYA Kisoji is an all-inclusive hot spring resort hotel surrounded by rich nature. Its highlight is an alkaline simple hot spring with a silky, viscous texture known as Silk no Yu. The outdoor area is equipped with a dry sauna and a cold plunge bath, and enjoying the open-air cool-down while gazing at a star-filled sky is a blissful moment.
TypeNatural Hot Spring
An alkaline simple hot spring known as Silk no Yu. It has a silky, viscous feel that leaves skin smooth after bathing, making it a skin-beautifying hot spring.
Sauna TypeDry Sauna
Stove Typeelectric
Capacity6people
A dry sauna with a convection stove installed in the outdoor area. It is set at a dry 90-95°C and comforts you with the scent of wood and healing music.
Capacity3people
A rock-style cold plunge bath in the outdoor area. The water temperature is around 17-21°C, allowing you to leisurely cool down while gazing at the stars at night.
Closed Days: None
2278 Azuma, Nagiso, Kiso District, Nagano 399-5302, 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