Yu no Tani Onsen (Kagoshima)

Kirishima, Kagoshima Prefecture, Japan

Location: Kirishima, Kagoshima Prefecture, Japan
Water type: calcium-rich
Temperature: 44 °C
pH: 7.3

Water profile

Thermicity

Sedative

44 °C

LowHigh

Relaxing — deep, immediate muscle release.

Mineralisation

Restorative

LowHigh

Loaded with major ions — the essential minerals (Ca, Mg).

Buoyancy

Standard buoyancy

LowHigh

Soft water — natural, classic buoyancy.

CalciumSulfatesMagnésium

Yu no Tani Onsen in Kagoshima Prefecture rises within the celebrated Kirishima Onsen cluster—one of Kyushu's most volcanically active thermal regions—where sulfated waters emerge from the caldera landscape of Kirishima-Kinkowan National Park, a UNESCO-recognized natural environment of exceptional value. The Kirishima cluster encompasses multiple springs of varying mineral composition, and Yu no Tani contributes its sulfate-rich waters to a resort complex famous for dramatic volcanic scenery and some of Kyushu's most therapeutically potent thermal bathing. A spring sharing the name exists in Ehime Prefecture and Niigata's Yunodani cluster, but this Kagoshima manifestation carries the raw volcanic intensity unique to the Kirishima caldera.

Insider tip — Yu no Tani Onsen is tucked in the volcanic landscape of the Kirishima range in northern Kagoshima Prefecture, one of Japan's most concentrated geothermal zones. The calcium-sulfate waters emerge at high temperature with a milky white haze produced by suspended mineral particles. The surrounding Kirishima-Kinkowan National Park offers dramatic crater lakes and hiking through azalea-covered volcanic slopes. Views of the active Shinmoe-dake volcano on clear days add a rare elemental grandeur to the bathing experience.

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