Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Shikama Hirasawa Onsen / Kappa no Yu, in Shikama, Miyagi Prefecture, taps a sodium-chloride spring at 41°C. An indoor bath, an outdoor rotenburo, and a sauna are available.
Insider tip — Kappa no Yu celebrates the kappa water sprite of Japanese folklore, the mischievous reptilian yokai said to inhabit cold mountain rivers and lakes. Shikama-cho in northern Miyagi is a rural community in the Kitakami River watershed where traditional kappa legends survive in local oral culture, and the cold clear streams of the Ou Mountain foothills are precisely the habitat these creatures are said to lurk — a reminder that Japanese folk ecology is geography.