Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Yuhama Onsen—the Hot Water Beach—combines the warmth of iodine-rich thermal waters with the refreshing atmosphere of a coastal Japanese location, where the thermal spring tradition meets the invigorating energy and mineral richness of the sea. Iodine-bearing springs are found principally along Japan's coastal plains and ancient sea-bottom sedimentary zones, where marine-origin organic matter has enriched the groundwater over millions of years of geological transformation. The union of coastal scenery and mineral-rich thermal bathing makes Yuhama an evocative destination where sea and spring reinforce each other for the renewal of body and mind.
Insider tip — Yuhama Onsen flows near the Sea of Japan coast at the mouth of the Mogami River in Sakata, Yamagata Prefecture, drawing iodine-rich sodium-chloride waters from deep coastal sedimentary layers. The salty marine-influence brine warms the body rapidly and leaves an insulating mineral layer on the skin, ideal for the cold, wind-swept winters of the Yamagata littoral. Sakata's historic kura (merchant warehouse) districts and the seasonal winter crab cuisine of the Japan Sea coast make this a full sensory destination. The onsen sits within walking distance of the scenic dunes of Shonai Beach.
