Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Goshogake Onsen in Kazuno sits within an active volcanic geothermal field in the Towada-Hachimantai highlands, where bubbling mud pools, steaming fumaroles, and sulfurous vents surround the historic wooden bathhouse in a landscape of raw geological energy. Bicarbonate-rich water in multiple temperatures fills indoor and rock-carved baths, and a short nature trail through the active geothermal zone turns the visit into a genuinely geological adventure among erupting mud geysers and mineral-encrusted vents. Goshogake ranks among Tohoku's most scientifically vivid and dramatically wild onsen destinations, where the volcanic earth's living power is felt directly underfoot.
Insider tip — Goshogake Onsen is a remote mountain spa in northern Akita accessed through dense beech forest on the slopes of the Hachimantai volcanic plateau. The sulfurous springs emerge at multiple temperatures across the property, with a unique outdoor mud pool — one of very few in Japan — where thermal mineral mud can be applied directly to the skin. The smell of hydrogen sulfide is strong but the experience of watching mud bubble and steam in the open mountain air is genuinely memorable. Combined visits with Tamagawa Onsen nearby offer a comprehensive Tohoku volcanic spa journey.
