Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Tarumizu, located on the Osumi Peninsula directly facing the dramatic silhouette of Sakurajima volcano across Kinko Bay, offers some of the most striking natural scenery in Kagoshima Prefecture. Tarumizu Onsen Kagoshima provides chloride-enriched thermal baths sourced from the geothermally active southern Kyushu volcanic belt, prized for their skin-softening and muscle-relaxing properties among local bathers. The contrast of volcanic energy, calm bay waters, and the rugged Osumi coastline makes this a memorable destination for thermal bathing enthusiasts exploring southern Kyushu.
Insider tip — Facing Sakurajima volcano across Kagoshima Bay, Tarumizu Onsen soaks guests in sodium-chloride water while offering one of Japan's most theatrical volcanic panoramas. The ash plumes from the active stratovolcano drift across the bay on clear days, lending the outdoor rotenburo a surreal otherworldly atmosphere. The ferry connection from Kagoshima City makes this a convenient half-day excursion from the prefectural capital.