According to the "Sankaiki" (Tadachika NAKAYAMA's diary) MINAMOTO no Yoritomo who was Sahyoe no jo (third-ranked officer of Sahyoe-fu, the Left Division of Middle Palace Guards) was appointed as Inkurodo of Josaimonin (nyoin (a close female relative of the Emperor or a womwan of comparable standing)) on February 19, 1159 (old calendar).
なお、女院である上西門院の院蔵人に左兵衛尉源頼朝が任命されたことが『山槐記』平治元年2月19日(旧暦)条に記されている。