Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Tennen Onsen Aroma is located in Naha, the capital of Okinawa Prefecture, on Japan's subtropical southern islands. Natural sodium-chloride water reaches 41°C, shared between an indoor bath, an outdoor rotenburo bath and a sauna.
Insider tip — Tennen Onsen Aroma in Naha taps into rare natural hot spring water on Okinawa's main island, where deep geothermal sources yield salty baths in a subtropical setting. The sodium-chloride waters are warming and soothing, offering a welcome contrast to the island's famous beaches and sea. This urban onsen is a local favorite for unwinding after exploring the colorful streets of Naha.