Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Megumi no Yu, at Kakamigahara Onsen in Gifu Prefecture, runs thermal sodium-chloride water at 39°C, with an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — 'Megumi no Yu' (blessed waters) at Kakamigahara Onsen in the city adjacent to Gifu's aviation museum — home of the Japan Aerospace Self-Defence Force's largest facility. Kakamigahara means 'fragrant fields' in classical Japanese. The blessed waters offer a grounding contrast to the high-tech aerospace environment next door.