Mount Atago was located in the historical Awa Province, which occupied the southern tip of the Bōsō Peninsula. Minamoto no Yoritomo (1147-1199), founder and first shōgun of the Kamakura shogunate, visited Awa Province shortly before his return to Kyōto and the establishment of the shogunate. He visited Mount Atago, dedicated a Jizō Bosatsu statue at the summit of the mountain, and vowed to return to the area.