Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Mitsuwa Onsen is located in Takaishi, Osaka Prefecture. Its sodium-chloride water, at 41°C, fills both an indoor bath and an outdoor rotenburo, with a sauna also on site.
Insider tip — In Takaishi on the southern Osaka Bay coast where the artificial Kansai International Airport island is visible across the water, Mitsuwa Onsen draws sodium-chloride spring water from the coastal Osaka Bay sedimentary basin; the facility serves the local community of a city transitioning from its industrial past toward a new coastal identity in the southern Osaka metropolitan fringe.