Letting Masamori gain accomplishments by appointing him for the defense against the direct petition by the monk-soldiers of Sammon gate (temple gate), for searching and capturing robbers, for hunting down and killing TAIRA no Naosumi in Kyushu region, and for others, the Cloistered Emperor Shirakawa promoted Masamori to jushiinoge (Junior Fourth Rank, Lower Grade).
山門衆徒の強訴の防禦、強盗の追捕や九州での平直澄の追討などに起用し功を上げさせ、従四位下にまで昇進させた。