Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
FerBicarbonatesManganèse
Hiraizumi Onsen Yukyu no Yu, in the historic town of Hiraizumi, Iwate Prefecture, draws iron-rich water at 38°C. It offers an indoor bath, an outdoor bath (rotenburo) and a sauna.
Insider tip — Hiraizumi Onsen Yukyu no Yu sits near the UNESCO World Heritage temples and gardens of Hiraizumi, once the cultural heart of northern Japan. The iron-tinted water has a distinctly earthy warmth appreciated by pilgrims and travellers exploring the Tohoku region. Soaking here after a day walking the Konjikido golden hall and Motsuji garden is a restorative ritual. The understated local bathhouse atmosphere contrasts beautifully with the grandeur of the surrounding heritage sites.