According to "Horyakukanki" (A History Book of the 14th century in Japan), around the era of Yoshitoki HOJO, Goro ANDO was assigned to the eastern Ezo to control the region, and according to "Suwa Daimyojin Ekotoba," Andota was appointed to Ezo kanrei (a shogunal deputy in Ezo).
『保暦間記』によると北条義時の頃、安藤五郎が東夷地の支配として置かれたとされ、『諏訪大明神絵詞』では安藤太が蝦夷管領となったとされている。