Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Tsurugaoka Onsen is an onsen (Japanese hot spring bath) located in Higashisumiyoshi Ward, Osaka. The water emerges at around 41°C. The site includes an indoor bath, an open-air bath (rotenburo) and a sauna. A simple spot, valued for its neighbourhood feel.
Insider tip — Tsurugaoka Onsen is an urban sento-style facility in the Higashisumiyoshi district of southern Osaka, drawing saline groundwater to serve the local residential community. Osaka's dense southern wards have maintained a strong sento culture, and facilities like Tsurugaoka serve as neighborhood anchors for communal bathing and socializing. The sodium-chloride waters provide warming and skin-conditioning benefits popular year-round with local regulars. The crane motif in the name (tsuru = crane) reflects traditional Japanese symbolism of longevity associated with mineral bathing.