Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Nakadake Onsen sits within the Daisetsuzan mountain range on Hokkaido. Its sulfurous thermal waters are available both indoors and in an open-air rotenburo, with a sauna on site, in a remote mountain setting.
Insider tip — Nakadake Onsen in the Daisetsuzan National Park area of Hokkaido — Japan's largest national park and most active volcanic region. Located near the Nakadake volcano and the Sounkyo Gorge. Wild geothermal hot spring in pristine alpine wilderness. Combine with hikes in Daisetsuzan's volcanic landscape and the dramatic Sounkyo Gorge with its icefall (hyobaku) in winter.