| Noun | 1. | Mount Asama - a volcano in central Honshu near Nagano; one of the largest volcanoes in Japan (8,340 feet)Hondo, Honshu - the central and largest of the four main islands of Japan; between the Sea of Japan and the Pacific Ocean; regarded as the Japanese mainland Nihon, Nippon, Japan - a constitutional monarchy occupying the Japanese Archipelago; a world leader in electronics and automobile manufacture and ship building volcano - a mountain formed by volcanic material | |