Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Nasu, in the northern highlands of Tochigi Prefecture, is one of the Japanese Imperial Family's favoured summer retreats, with the Nasu Imperial Villa nestled in its cool forested plateau above the active volcanic complex of Mount Nasu. Nasu Onsen Yumoto Kinugawa Extended taps the sulfate-rich volcanic waters emerging from the active hydrothermal system of the Nasu volcanic group, offering baths long prized in the onsen tradition for their soothing, restorative character. The surrounding Nikko National Park, with its autumn foliage, crater lakes, and diverse wildlife, makes this a year-round highland spa destination of exceptional scenic character.
Insider tip — Nasu Yumoto sits at 900 metres on the flanks of the active Chausu-dake volcano in the Nasu highlands, channelling vivid sulfurous spring water from the Yutaki vent that has flowed continuously for over 1,200 years. The waters are strongly acidic and milky-white, and the Komanoi Shrine at the source is one of the oldest thermal spring shrines in the Kanto region. Imperial villas nearby make Nasu a favourite summer retreat for the Japanese royal family, lending the highland resort an air of understated exclusivity.
