The reasons why Kagemori was appointed to Akitajo no suke might be as follows: his sister was married to MINAMOTO no Noriyori, Noriyori's foster father was FUJIWARA no Norisue and a daughter of FUJIWARA no Norisue was the mother of Emperor Juntoku, and Kagemori had a connection with Tadanobu BOMON who was a brother of Sanetomo's wife.
景盛の秋田城介任官の背景には、景盛の姉妹が源範頼に嫁いでおり、範頼の養父が藤原範季でその娘が順徳天皇の母となっている事や、実朝夫人の兄弟である坊門忠信との繋がりがあったと考えられる。