Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Raku, in Fujisawa, Kanagawa, near the Shonan coast, uses sodium-chloride water at 41°C. An indoor bath, an outdoor rotenburo and a sauna are available.
Insider tip — Raku Onsen serves Shonan-dai in Fujisawa City on the Shonan coast of Kanagawa where the Pacific-facing beach culture of surfing, cycling, and coastal dining defines one of Japan most aspirational suburban landscapes. Fujisawa is the mainland gateway to Enoshima Island — connected by a causeway across Sagami Bay — whose hilltop Benzaiten shrine, wave-carved sea caves, and panoramic views over the Pacific have drawn visitors from Edo since the 18th century in one of the most enduring coastal pilgrimage traditions in the Kanto region.