Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Terme Villa Churauyu is located in Uruma, Okinawa Prefecture, Japan. Its sodium-chloride water reaches around 41°C, used in indoor pools with a sauna, massage service and hammam.
Insider tip — This spa hotel on Okinawa's main island draws sodium-chloride thermal water from deep bores, blending the Ryukyu archipelago's subtropical setting with traditional Japanese bathing culture. The seawater-influenced mineral composition reflects Okinawa's limestone geology and proximity to the East China Sea. Guests can soak while enjoying views of the emerald coastline typical of Japan's southernmost prefecture. The mild climate means outdoor rotenburo baths are comfortable year-round, making this a year-round wellness destination.