Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
BicarbonatesSodiumCalcium
Miboro Onsen is a tranquil hot spring retreat in Shirakawa, Gifu Prefecture, situated in the mountainous Shokawa River valley of the Japanese Alps. Its siliceous waters are known for their gentle mineral composition that soothes tired muscles and nourishes the skin, making it a cherished destination for those exploring the remote White River region. The surrounding landscape of dense cedar forests and crystal-clear mountain streams provides a peaceful backdrop for open-air bathing throughout all four seasons.
Insider tip — Perched above the Miboro Dam reservoir in the Shokawa Valley, this onsen commands sweeping views of deep mountain fjords that shift color with the seasons. Bicarbonate spring water at 40°C is prized for its mild skin-softening qualities. The area sits near the UNESCO-listed Shirakawa-go gassho-zukuri farmhouses, making a combined cultural and thermal itinerary highly rewarding. Mornings offer misty valley reflections visible directly from the bath windows.