Uchitsu Onsen

Mizunami, Gifu, Japan

Location: Mizunami, Gifu, Japan
Water type: bicarbonate, carbonated
Temperature: 38 °C
pH: 6.3

Water profile

Thermicity

Neutral

38 °C

LowHigh

Soothing — neither hot nor cold, perfect balance.

Mineralisation

Restorative

LowHigh

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

Buoyancy

High buoyancy

LowHigh

Mineralised water — eases movement and joints.

CO2BicarbonatesMagnésium

Uchitsu Onsen is a hot spring resort in Japan whose bicarbonate and carbonated mineral waters combine the alkaline, cleansing character of bicarbonate-rich water with the stimulating effervescence of natural carbon dioxide, creating a distinctive bathing experience that leaves the skin feeling smooth and refreshed. Naturally carbonated hot springs are relatively rare in Japan and prized by bathing enthusiasts for their unique tactile quality, as the tiny carbon dioxide bubbles attach to the skin and create a pleasantly tingling sensation during immersion. The thermal tradition associated with bicarbonate carbonated waters is one of relaxation and vitality, making Uchitsu Onsen a destination valued both for its sensory pleasures and its place within the Japanese hot spring classification system.

Insider tip — Uchitsu Onsen in the Gifu prefecture sits in the Tono region of eastern Gifu — a landscape famous for Mino ceramics, one of Japan's most important pottery traditions, and the deep forested valleys of the central Japanese mountains. The bicarbonate-carbonated springs serve a region where the ancient Nakasendō highway once connected Edo to Kyoto through the mountains, and where the combination of fine ceramic clay, forested terrain, and mineral springs shaped a distinctive inland Honshu culture.

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