Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
BicarbonatesSodiumCalcium
Ohda Onsen is situated in Oda City, Shimane Prefecture, the gateway to the Iwami Ginzan Silver Mine — a UNESCO World Heritage Site and one of the world's most important historical silver mines, which supplied silver to Asian trade networks throughout the sixteenth and seventeenth centuries, shaping global economic history. The siliceous thermal waters here complement a landscape of remarkable historical depth, where the silver mining heritage of the Iwami region is preserved in mine tunnels, samurai residences, and a historic merchant town that remains largely intact. Bathing at Ohda Onsen provides a restorative experience in proximity to one of Japan's most internationally significant UNESCO Heritage sites, connecting visitors to the economic forces that once shaped the early modern global economy.
Insider tip — Oda is Shimane's gateway to the UNESCO-listed Iwami Ginzan Silver Mine, a World Heritage site set amid densely wooded mountains. The onsen waters are gentle bicarbonate springs that refresh miners-turned-visitors after touring the historic mineshafts and merchant town of Omori. Book a traditional inn in the Yunotsu hot spring village nearby for an immersive Edo-era atmosphere.