Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Hachimantai Onsenkyō is a collective name for the group of hot springs in the alpine zone of the Hachimantai highland straddling the border of Akita and Iwate Prefectures in northern Honshu, designated as a national health resort hot spring area and encompassing multiple distinct springs with varied mineral compositions including simple, sulfurous, and ferruginous waters at the high altitude of the volcanic plateau. Hachimantai is a vast volcanic highland of wetlands, beech forests, and alpine meadows within the Towada-Hachimantai National Park, famous for its spectacular winter snowscapes, autumn foliage, and the ghost forest of Aspite Line where trees encrusted in snow and ice create a surreal winter landscape. The thermal springs of Hachimantai Onsenkyō provide bathers with the invigorating experience of soaking in mineral waters surrounded by one of the most dramatic and unspoiled highland environments in all of northern Japan.
Insider tip — Hachimantai Onsenkyō clusters around the volcanic Hachimantai plateau straddling Iwate and Akita prefectures in the Tohoku highlands. Multiple hot spring villages here tap distinct volcanic waters — the sulfurous spring group carries a pale milky-white color while the iron-rich variety emerges with a reddish tinge. The surrounding national park offers alpine marshlands and beech forests that blaze with color each autumn. Snow covers the plateau well into spring, making rotenburo soaking against a snow-draped volcanic landscape a defining experience.