Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Satsunai Garden Onsen, in Makubetsu, Hokkaido, offers sodium-chloride water at 41°C, split between an indoor bath and an outdoor rotenburo, with a sauna.
Insider tip — In Makubetsu beside the Satsunai River — whose Ainu-origin name reflects the indigenous heritage of the Tokachi Plain — this garden onsen draws natural sodium-chloride spring water from the broad agricultural basin; Makubetsu's sugar beet processing, potato farming, and horse breeding industries represent the industrious pioneer spirit of Hokkaido's most productive agricultural region.