Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Tennen Onsen Kushimoto is also located in Kushimoto-cho, Wakayama Prefecture. The sodium-chloride water surfaces at 42°C, pH 7.3. Amenities include an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — At Kushimoto on Japan's southernmost Honshu tip, where the warm Kuroshio Current meets the rocky Kii Peninsula coastline, this natural hot spring draws saline waters influenced by the ocean's geothermal energy; the nearby Kushimoto Marine Park with its glass-bottomed boat tours over tropical corals makes this coastal onsen part of an extraordinary southern Wakayama adventure.