Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Arao Onsen, called Dream no Yu, is a bathhouse in Arao, Kumamoto Prefecture. The sodium-chloride water emerges at 39°C. Guests can use an indoor bath, an outdoor rotenburo bath and a sauna.
Insider tip — 'Dream no Yu' at Arao Onsen in Arao city, northwestern Kumamoto facing the Ariake Sea. Arao was one of Kyushu's major coal mining cities until the mines closed in the post-war economic transformation. The 'dream' name reflects the city's reinvention: from coal-black industrial heritage to a leisure and wellness culture for the 21st century. The Ariake Sea's tidal flats here host the world's largest concentration of horseshoe crabs (Tachypleus tridentatus).