Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreBicarbonateSilice
Located in the picturesque valley of Hida, Japan's Hirayu Onsen is one of the largest hot springs in the Japanese Alps. The creamy, sulfur-rich water at 90 degrees Celsius is a unique experience for visitors. This natural spa has been a favorite among locals and travelers alike for centuries. Soak up the tranquility of this serene onsen.
Insider tip — Hike from Hirayu to Kamikochi - Japan's most beautiful alpine park - following the Azusa River between 3,000-metre peaks.