Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Yobitsuru Onsen is located in the city of Shunan, Yamaguchi Prefecture. Its sodium-chloride thermal water is kept around 40°C (pH 7.3), serving an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — Shunan's coastline hosts Japan's largest petrochemical complex — the nighttime illuminations of the refinery and chemical plant towers have become an unlikely tourist attraction known as 'factory light show' (kojo-moe). 'Yobitsuru' (Calling Crane) invokes the sacred red-crowned cranes that historically nested in Yamaguchi's coastal wetlands before industrialization. This neighborhood onsen offers warm sodium-chloride waters and a meditative counterpoint to the roaring industrial landscape just outside — a characteristically Japanese acceptance of industrial and natural coexistence.