Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Hirayama Onsen, home to the Hana no Bandai bath, is located in Yamaga, Kumamoto Prefecture. The thermal, sodium-chloride water flows at 40°C, pH 7.3. The facility features an indoor bath, an outdoor rotenburo bath and a sauna.
Insider tip — 'Hana no Bandai' (花の番台 — flower reception desk) at Hirayama Onsen in Yamaga's Hirayama Onsen neighborhood. The 'bandai' is the wooden platform where the bath attendant sits — raised above the entrance hall, overseeing both the men's and women's sides simultaneously, collecting entry fees and monitoring the bath. It is one of the most recognizable cultural artifacts of the Japanese sento. Naming the spring for the 'flower reception desk' honours this humble but essential position in Japanese bath culture.