Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Tonami Onsen Bijin no Yu is a sulfurous onsen in Mutsu, Aomori Prefecture, in northern Japan. The water, at 44°C, is available in an indoor bath and an outdoor rotenburo, with a sauna on site.
Insider tip — The Shimokita Peninsula of Aomori prefecture is dominated by Ōsorezan (Mount Fear) — Japan's most revered sacred mountain of death, its volcanic caldera lake surrounded by sulfurous fumaroles and stone statues of Jizo, believed since ancient times to be the gateway to the underworld. Tonami Onsen Bijin no Yu (Beautiful Woman's Hot Spring) draws on the same volcanic system in this haunted and magnificent landscape at the remote northern tip of Honshu, where Buddhist pilgrimage and volcanic geothermal energy have intersected for centuries.