Hakone , the  Izu Peninsula , and the  Izu Islands . - = Mount Fuji area = - Mount Fuji Mount Fuji  is the highest  mountain  in  Japan  at 3,776.24 m (12,389 ft). Shiraito Falls Aokigahara Aokigahara , also known as the  Sea of Trees , is a 35 km 2   forest  that