Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Iriomote Jungle Spa is nestled on Iriomote Island, a UNESCO World Heritage component and home to Japan's largest subtropical rainforest — a dense tangle of mangroves, river gorges, and waterfalls that covers more than 90 percent of the island's surface. This extraordinary wilderness shelters the critically endangered Iriomote cat, a small wild feline found nowhere else on Earth, making the island one of Asia's most important biodiversity hotspots. Guests soak in mineral-rich waters drawn from the island's geothermal sources while listening to the calls of endemic birds echoing through the jungle canopy of Okinawa's outermost reaches.
Insider tip — Iriomote is Japan's second-largest subtropical island and one of its wildest, covered almost entirely by UNESCO-listed mangrove forest and jungle. The jungle spa concept here blends the island's tropical character with the Japanese onsen tradition, using seawater-influenced sodium-chloride water characteristic of the Yaeyama chain. Kayaking through mangrove rivers in the morning and relaxing in an open-air bath at dusk is the quintessential Iriomote experience. The island hosts the endangered Iriomote wildcat, and guests with rooms near the forest edge occasionally spot one after dark.
