Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
CalciumSulfatesMagnésium
Yu no Tsuru Onsen in Kumamoto Prefecture flows with sulfate-rich thermal waters in Kyushu's most geothermally productive island, where the Aso volcanic caldera and the broader volcanic arc of the central Kyushu highlands produce thermal springs of remarkable mineral intensity across a wide territory of mountain, plateau, and river valley terrain. The name Yu no Tsuru, meaning crane of the hot water, evokes the revered crane in Japanese culture — a bird associated with longevity, good fortune, and the refined beauty of natural landscapes — suggesting a spring whose setting embodies the graceful, auspicious character of one of Japan's most beloved avian symbols. Yu no Tsuru Onsen's sulfate mineral waters and its culturally resonant name invite visitors to experience thermal bathing as both a relaxing and an aesthetic pleasure, where the distinctive character of volcanic mineral water meets the lyrical tradition of Japanese natural naming in a setting shaped by the intense geothermal energy of Kyushu's volcanic highlands.
Insider tip — Yu no Tsuru Onsen flows near the volcanic Kirishima range in southern Kagoshima Prefecture, an area dotted with dozens of hot spring resorts that exploit the intense geothermal activity beneath. The calcium-rich waters are clear and mild, popular with families and older visitors seeking a gentle restorative soak. The surrounding coastline of the Satsuma Peninsula offers dramatic views of Kaimondake volcano, and seafood from Kagoshima Bay is abundantly available at the ryokan restaurant. Try the local specialty of chicken sashimi and sweet potato shochu alongside your evening bath.