Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
FerBicarbonatesManganèse
Sakae Onsen, known as Ushi no Yu, is set in Maizuru, Kyoto prefecture, on the Sea of Japan coast. Its iron-rich water, with a pH of 6.3, emerges at 38°C in an indoor bath and a rotenburo, with a sauna.
Insider tip — Sakae Onsen Ushi no Yu is an iron-rich thermal bathhouse near the Japan Sea coast of the Kyoto-Fukui border area. The reddish ferruginous water stains the bath tiles a characteristic amber and is reputed to improve blood circulation. The rural setting amid forested hills makes it a peaceful escape from Kyoto city. The name Ushi no Yu, meaning bath of the ox, hints at the enduring local folk tradition around these curative waters.