The Yachiho Plateau extends to the eastern foot of Mt. Northern Yatsugatake. On this vast Yachiho Plateau, 500,000 birch forests are vegetated on a site of about 200 ha. The forest is called the best birch forest in the Orient. At the top of the Yachiho Plateau is Shirakoma Pond, the largest lake in Japan, where moss and native forest are mysterious. The pond has a circumference of 1.35 kilometers and is located in the highlands at an altitude of 2,000 meters.