Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Nikoniko Onsen, part of the Nikoniko Plaza complex in Fukuchiyama, Kyoto Prefecture, runs thermal sodium-chloride water at 38°C, with an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — 'Nikoniko' (smiley/happy) Onsen at Nikoniko Plaza in Fukuchiyama, northern Kyoto Prefecture — the gateway to the Tango Peninsula's cape. A cheerfully named community onsen in this castle-town famous for the tragic legend of Akichi Mitsuhide (who betrayed Nobunaga in 1582 at Honnoji).