Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Sannai Nukumori Onsen is located in Kamoenai, on the west coast of Hokkaido, Japan's northernmost main island. The sodium-chloride water flows at 42°C, pH 7.3. The site includes an indoor bath, an outdoor rotenburo bath and a sauna.
Insider tip — Nukumori, meaning warmth and human connection, perfectly captures what this community spring offers in remote Kamoenai-mura on the Shakotan Peninsula. The village is one of the smallest in Hokkaido, sustained by sea urchin and abalone diving, and the spring serves as a social hub for a fishing community far from the nearest city.