吾妻鏡
The shrine was relocated to the shores of Lake Ashi; its current form dates to 1667. Credit for establishment is also given to Priest Mangan, for pacifying the nine-headed dragon that lived at the bottom of Lake Ashi. According to the "Azuma Kagami", Minamoto no Yoritomo sought guidance and shelter from the kami at Hakone after his defeat in Battle of Ishibashiyama during the Genpei War. Upon becoming shōgun, Yoritomo became a patron of the shrine.