Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Kushimoto Onsen Sango no Yu sits in Kushimoto, Wakayama Prefecture. Its sodium-chloride water emerges at 41°C, pH 7.3. The venue includes an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — Sango no Yu, meaning Coral Bath, sits at the very southern tip of the Kii Peninsula where the Pacific meets ancient cliffs. The sodium-chloride spring mirrors the nearby sea, leaving skin softened and faintly salty after a soak. On clear days the outdoor tub offers sweeping views of Cape Shio and the small islands scattered offshore. The facility takes its name from the local coral reefs, and the water's warming effect is welcome after snorkelling the cool sea around Kushimoto Marine Park.