Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Tennen Onsen Jabu is located in Yokkaichi, Mie Prefecture, Japan. Its natural sodium-chloride water emerges at around 41°C, with an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — In Yokkaichi, a city that transformed environmental disaster into environmental leadership — the site of Japan's worst air pollution crisis in the 1960s that catalyzed groundbreaking clean air legislation — Tennen Onsen Jabu (splash spring) rises from clean deep aquifers far beneath the petrochemical industry; the city's dramatic green recovery story adds meaningful context to the mineral bathing experience.