Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Kannawa Onsen is one of the celebrated Beppu Hatto—the Eight Spring Zones of Beppu—in Oita Prefecture, Japan's thermal capital, and is famous above all others for its mukashi-mushi tradition: the use of volcanic steam, rather than liquid water, to cook food in bamboo steamers placed over the natural ground vents, creating a form of culinary geothermal cooking unique to Beppu's most volcanically active district. The sulfurous waters carry the volcanic intensity characteristic of Kannawa's position directly over one of the most thermally active geological zones in all of Japan, where the earth's thermal output is so high that it drives both healing springs and food preparation simultaneously. Bathing at Kannawa means participating in a hot spring culture that is simultaneously the most domestic and the most primally volcanic in the entire country.
Insider tip — Kannawa is the most famous of Beppu's eight hot spring zones, dramatically marked by rising clouds of steam that drift across the district at all hours. The sulfurous waters are superheated at source and used for jigoku steam cooking as much as bathing. Visitors can explore the boiling hell ponds, including the vivid cobalt-blue Umi Jigoku, before descending into a gentler public bath. The onsen mushi ager boxes allow you to steam-cook local sweet potatoes and eggs directly over the geothermal vents.