After Mount Fuji and Mount Ontake, Mount Norikura is the third tallest volcano in Japan. It is a stratovolcano and hardened lava flows can still be seen near the peak. There are eight plains and 12 crater lakes on the mountain that were formed by volcanic activity. The Norikura Skyline is a road through the mountain, but it has to be closed for much of the year because of heavy snow fall. Even in the summer, some snow remains on the northeastern face of the mountain.