Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
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Dense, salty water — you float without effort.
SodiumChloruresBrome
Gujohachiman Onsen is a charming hot spring in the historic castle town of Gujo, situated in the Nagara River valley of central Gifu Prefecture, renowned throughout Japan for its extraordinary summer Bon Odori dance festival lasting over 30 consecutive nights. The chloride-rich thermal waters provide deep body warmth and ease muscular fatigue, serving as a restorative retreat for visitors who come to experience this UNESCO-recognized festival and the town's beautifully preserved Edo-period townscape of wooden merchant houses and stone-paved water channels. The clear mountain streams of the Nagara River, famous for their pristine water quality and cormorant fishing tradition, complete the sensory richness of a visit to this cultural gem of inland Japan.
Insider tip — Gujo Hachiman Onsen is found in the castle town that hosts Japan's most celebrated Bon Odori festival each summer, where dancers perform through the night for a full month. The sodium-chloride spring here offers a warming soak beside the clear Yoshida River. The town is unusually atmospheric, with water channels running along every street and koi visible beneath the surface. Bathing after an evening of festival dancing is a local tradition worth joining.