Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Hakutan Onsen, also called Fureai no Yu, is located in Taketa, Oita Prefecture. Its sodium-chloride thermal water reaches around 39°C, with an indoor bath, an outdoor rotenburo bath and a sauna.
Insider tip — 'Fureai no Yu' (ふれあいの湯 — community exchange spring) at Hakutan Onsen in Taketa city. 'Hakutan' (白炭 — white charcoal) references the traditional Japanese charcoal-making that sustained mountain communities like Taketa for centuries — the slow-burning white charcoal (binchotan) of the highland forests. The community exchange spring serves both residents and visitors to Taketa's remarkable cultural landscape: the castle ruins, the Kojo no Tsuki melody, and the hidden forests where charcoal burners once worked.