Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Rakuraku Onsen is located in Date, on the island of Hokkaido. The sodium-chloride water reaches 41°C at the source. An indoor bath, an outdoor bath (rotenburo) and a sauna are available to visitors.
Insider tip — Rakuraku Onsen sits in the Date region of southwestern Hokkaido, where the volcanic geology of Usu and Showa-Shinzan mountains infuses the thermal waters with a robust sodium-chloride mineral profile. The warming properties of the saline waters are particularly valued in Hokkaido's long cold winters, when soaking sessions can extend well over an hour. The facility offers panoramic views of Uchiura Bay from its upper-floor baths on clear days. Snow-season visits provide a classic Hokkaido onsen experience with steam rising into frosted air.