Because her daughter Teishi became chugu (the second consort of an emperor) of Emperor Ichijo, she was raised from Jugoinojo (Junior Fifth Rank, Upper Grade) to Shosanmi (Senior Third Rank) on October 26, 990.
定子が一条天皇の中宮に立てられたため、正暦元年（990）10月26日、従五位上から正三位に昇叙。