Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
High buoyancy
LowHigh
Mineralised water — eases movement and joints.
CO2BicarbonatesMagnésium
Saga Yamato Onsen Hotel Amandi is a thermal hotel in Saga Prefecture on the island of Kyushu, offering bicarbonate, carbonated, and calcium-rich hot spring waters whose diverse mineral profile makes the baths both luxuriously pleasurable and therapeutically substantive. The carbonation in the waters enhances skin oxygen uptake and circulation, the calcium content supports bone density and muscular function, and the bicarbonate balance softens the skin and promotes detoxification — a combination of benefits that reflects the volcanic geological richness of Kyushu's thermal region. Saga's position in western Kyushu, near ancient kiln sites and the historic port gateway to continental Asia, provides a cultural context that enriches the experience of soaking in these exceptional geothermal waters.
Insider tip — Saga Yamato Onsen Hotel Amandi draws a complex bicarbonate-carbonated-calcium spring in Saga Prefecture on Kyushu, a region geologically active enough to produce rare multi-mineral waters not far from the ancient ceramics capital of Arita. The carbonated component delivers a light effervescence against the skin that accelerates warmth absorption and is prized in Japanese bathing culture for its cardiovascular benefits. The hotel setting allows for overnight stays with kaiseki dining featuring local Saga beef and fresh Ariake Sea seafood. Book the private open-air bath for an intimate experience with views of the surrounding Saga plain.