When Ishi became the empress, Michinaga accomplished an unprecedented great achievement, namely all of Sango (empress, empress dowager and great empress dowager) were his daughters at that time.
また威子の立后は道長が三后（皇后・皇太后・太皇太后）をすべて我が娘で占めるという前代未聞の偉業の達成である。