Akiyoshido Cave is one of Japan’s most impressive limestone caves, featuring a dramatic river-fed entrance, vast underground chambers, and a scenic hike across the Akiyoshidai Plateau.

Ryugashido Cavern in Shizuoka offers a quiet, immersive look into Japan’s underground landscapes, featuring dramatic limestone formations and a striking 30-metre underground waterfall.

Step into Mount Fuji’s volcanic past with a visit to the Narusawa Ice Cave and Fugaku Wind Cave—two unique underground worlds shaped by lava and time.