Awa no Tsubone became a wet nurse for the second son of Yoritomo, Senmanmaru (later MINAMOTO no Sanetomo), and thereafter established an unspectacular but solid position in the Yoritomo administration.
阿波局は頼朝の次男千幡丸（後の源実朝）の乳母となり、以降頼朝政権において地味ながら着実な地位を築いた。