Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
In a traditional Japanese onsen, guests immerse themselves in a serene and tranquil environment, bathing in natural hot spring waters. This culturally revered tradition emphasizes communal respect, modesty, and relaxation. Guests typically bathe separately before entering the hot spring, then return to a bathing area where they socialize and unwind. The onsen experience is deeply rooted in Japanese culture, promoting a sense of calm and spiritual connection with nature.
Insider tip — Dorinzawa Onsen is a thermal bath on the island of Hachijōjima (Izu Islands, Tokyo), a volcanic island 287 km south of Tokyo, reachable by a 10-hour ferry or a 55-minute flight. Hachijōjima is nicknamed 'the island of Venus' for its sulfurous hot springs and tropical beaches. Miyaki no Onsen and Mitsune Onsen are the best known, but this island hides several secret springs.