Nevertheless he was actually under guidance of his father Noriyuki YAMANA, and he lived most of his life in Kyoto as otomoshu (a group of about ten attendants who joined the shogun at banquets and accompanied him) of Yoshimasa ASHIKAGA, rather than worked actively as Shugo.
しかし、実際は父・教之の指導下に置かれており、守護として活躍したと言うより足利義政の御供衆として人生の大半を京都において過ごした。