Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
BicarbonatesSodiumCalcium
Totsukawa, a remote mountain village in the deep interior of the Kii Peninsula in southern Nara Prefecture, was once famous as Japan's largest village by area, stretching across a vast river watershed where pristine river gorges of extraordinary scenic beauty have been preserved by the region's isolation. Totsugawa Onsen draws on sodium and bicarbonate thermal waters rising from the geothermal depths of the Kii mountain range, providing simple open-air baths and riverside onsen that embody the Japanese concept of hitou — a hidden, undiscovered spa known only to those who seek it. The Nakatsu and Totsukawa river gorges, carved through ancient Precambrian rock, create a wilderness landscape unlike anywhere else on Honshu island.
Insider tip — Totsugawa is one of Japan's most remote onsen villages, reachable only by mountain road deep in the Kii Peninsula. The clear bicarbonate spring flows freely in a valley carved by the Totsu River, and outdoor riverside rotenburo are the highlight. Come in autumn when the surrounding mountains blaze with red and gold maples reflecting in the river pools.