Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Kitsuneuchi Onsen, an onsen in Shirakawa, Fukushima, offers a soak in thermal sodium-chloride water at 40°C, alongside an outdoor bath (rotenburo) and a sauna.
Insider tip — 'Kitsuneuchi' (fox hollow) Onsen in Shirakawa, southern Fukushima — near the gateway to Tohoku where the ancient barrier Shirakawa no Seki once stood. The fox (kitsune) is a spirit of transformation in Japanese folklore; the whimsically named bath offers a warming transformation after exploring the Nasu mountain range.