Honshu is Japan's largest and most populated island. It has 10,084 kilometers of coastline and is the world's second most populated island.
Honshu is considered to be Japan's mainland, and like the rest of the country, it is volcanic and mountainous. Mount Fuji, an active volcano, is the highest peak on the island, and Honshu's Shinano River is the largest in Japan. The climate in the area varies greatly and ranges from subtropical in the southern areas to cool in the northern areas near Hokkaido. The largest cities on this island include the nation's capital, Tokyo, as well as Osaka and Kyoto.