There are eight springs at Oshino Hakkai Springs. At one time, what we now know as Oshino-mura used to be a lake. Mt. Fuji erupted many times, gradually filling the space between Fujisusono and Mt. Misaka. This abraded and drained the area so that, over long period of time, the lake finally dried up. However, some springs that received water from Mt. Fuji's underground water reservoir remained. Oshino Hakkai is one of the representatives of those springs.