Fuji, MountFu‧ji, Mount /ˈfuːdʒi/ (also Fu‧ji‧ya‧ma /ˌfuːdʒiˈjɑːmə/)a volcano, about 100 km southwest of Tokyo, which is the highest mountain in Japan. Its top has the shape of a perfect cone and it has been the subject of many paintings and poems for centuries.