Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Hisayama Onsen Hotel Yumeya, in Hisayama, Fukuoka Prefecture, heats sodium-chloride thermal water to 40°C (104°F). An indoor bath, an outdoor rotenburo and a sauna are on offer.
Insider tip — A hotel onsen in Hisayama-machi, a quiet town northeast of Fukuoka City famous for its multi-decade longevity research study. The relaxed, wooded setting and warm sodium-chloride waters are perfectly in keeping with the town's reputation for healthy living.