Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Hamada Onsen in Hamada city on the Shimane coast draws chloride-rich thermal waters from Japan Sea-facing volcanic geology in the Iwami region, known historically as a major center of Japanese iron culture and Buddhist bronze-casting. The coastal onsen town offers bathing with views of the Japan Sea's dramatic winter waves that crash against basalt sea stacks, while in summer the calm ocean turns aquamarine for swimming and surfing. The spectacular Iwami Kagura mask dances — thunderous theatrical performances retelling Shinto mythology that evolved in this region over the last thousand years and are performed at shrines throughout Shimane — give Hamada's onsen culture a uniquely dramatic regional backdrop.
Insider tip — Hamada Onsen faces the rugged San-in Kinenkoku National Park coastline where the Sea of Japan meets dramatic sea cliffs. The sodium-chloride waters are drawn from deep below the coastal plain and are known locally for warming the body against Shimane's cold ocean winds. The town's fishing port supplies first-class yellowtail and crab that appear on ryokan dinner tables just steps from the baths.