A legendary hidden hot spring in Shikoku, located in Iya, one of Japan's three most secluded regions. It was the only Japanese destination selected by the U.S. travel magazine Travel + Leisure for its list of the 50 Places to Visit, and in recent years it has seen explosive popularity among inbound tourists. Access to the open-air bath along the mountain stream is by a dedicated cable car that descends about 250 m down a steep V-shaped gorge cliff, creating an overwhelming sense of escape from the ordinary and stirring a strong spirit of adventure that you simply cannot experience elsewhere. With alkaline, free-flowing spring water adorned by white mineral deposits drifting through the bath, and a hidden-valley experience that preserves Japan's original landscapes such as the kazura bridge, this world-class onsen resort strongly captivates travelers from overseas.