Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
FerBicarbonatesManganèse
Uneme Onsen is located in Koriyama, Fukushima prefecture. Its iron-rich water emerges at 38°C with a pH of 6.3, and the site offers an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — Uneme Onsen taps iron-rich mineral waters in the Koriyama basin of Fukushima Prefecture, an area with a long bathing tradition rooted in Tohoku's volcanic geology. The reddish-brown waters are rich in ferrous bicarbonate and traditionally valued for improving circulation and skin tone. The onsen takes its name from the ancient Uneme legend linked to nearby Uneme Shrine. Come in autumn when the surrounding hills blaze with momiji foliage.