Mt. Iwadono and Maruyama Park

Mt. Iwadono allows you to see castle ruins within walking distance of Otsuki Station. Local lore says the mountain was first used at the end of the 9th century with the establishment of the Tendai sect Entsuji Temple at Mt. Iwadono. Afterwards, it was used as a training ground for monks of the Shugendo tradition until the construction of Iwadono Castle in the 16th century under the reign of Takeda Clan general, Oyamada Nobushige.