One of Japan's finest highly alkaline hot springs and the warmth of a wooden dome
Yamanashi Yamanakako Village
Located in Yamanakako village, Yamanakako Hirano Onsen Ishiwari-no-Yu is a day-use hot spring facility notable for its wooden dome-shaped architecture built from locally sourced chestnut wood and cypress. The spring is a rare, highly alkaline hot spring with a pH of 10.2, popular as a skin-beautifying bath that leaves the skin feeling smooth. The large public bath includes a dry sauna, and the outdoor rock bath and cypress bath offer a relaxing experience while breathing the clear mountain air. The natural lukewarm source spring is also ideal for long soaks.
Typeindoor
A top-class highly alkaline hot spring in Japan with a pH of 10.2. Its mild composition is gentle on the skin and is expected to provide skin-beautifying and fatigue-relieving benefits. In addition to indoor baths, there are outdoor cypress baths and rock baths.
Sauna TypeDry Sauna
Stove Typefar_infrared
Capacity5people
A compact convection-style dry sauna set at approximately 88°C to 90°C. Its mild heat lets you sweat slowly and thoroughly.
Water Qualitynatural
Capacity5people
A lukewarm bath using the spring water directly from the source, suitable for cooling down after a sauna. You can take your time to fully experience the effects of the highly alkaline spring.
Water Qualitytap
Capacity6people
A cold plunge bath with a very mild temperature range of approximately 18°C to 30°C. Even those who are sensitive to very cold water can enter comfortably and cool down at a relaxed pace.
Closed Days: Thursday
1450 Hirano, Yamanakako-mura, Minamitsuru-gun, Yamanashi 401-0502, 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
One of Japan's finest highly alkaline hot springs and the warmth of a wooden dome
Yamanashi Yamanakako Village
Located in Yamanakako village, Yamanakako Hirano Onsen Ishiwari-no-Yu is a day-use hot spring facility notable for its wooden dome-shaped architecture built from locally sourced chestnut wood and cypress. The spring is a rare, highly alkaline hot spring with a pH of 10.2, popular as a skin-beautifying bath that leaves the skin feeling smooth. The large public bath includes a dry sauna, and the outdoor rock bath and cypress bath offer a relaxing experience while breathing the clear mountain air. The natural lukewarm source spring is also ideal for long soaks.
Typeindoor
A top-class highly alkaline hot spring in Japan with a pH of 10.2. Its mild composition is gentle on the skin and is expected to provide skin-beautifying and fatigue-relieving benefits. In addition to indoor baths, there are outdoor cypress baths and rock baths.
Sauna TypeDry Sauna
Stove Typefar_infrared
Capacity5people
A compact convection-style dry sauna set at approximately 88°C to 90°C. Its mild heat lets you sweat slowly and thoroughly.
Water Qualitynatural
Capacity5people
A lukewarm bath using the spring water directly from the source, suitable for cooling down after a sauna. You can take your time to fully experience the effects of the highly alkaline spring.
Water Qualitytap
Capacity6people
A cold plunge bath with a very mild temperature range of approximately 18°C to 30°C. Even those who are sensitive to very cold water can enter comfortably and cool down at a relaxed pace.
Closed Days: Thursday
1450 Hirano, Yamanakako-mura, Minamitsuru-gun, Yamanashi 401-0502, 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