Caving is an outdoor activity that anyone can enjoy. Caving, also known as spelunking. MC Harry Sugiyama visits the Fuji Fugaku caves near Mt. Fuji's atmospheric forest foothills, led by Yoshida Katsuji, known as one of the world's "Cave Kings." With his expert guide, Harry traverses tricky trails into the caves' world of darkness to discover fantastic walls of ice that soothe the spirit.