FUJIWARA no Tadahira, the patriarch of the Northern House of Fujiwara clan, was also a connoisseur of court ceremony etiquette who performed ceremonies by respectfully following the precedents, as was described in detail by "Teishinko-ki" (Diary of FUJIWARA no Tadahira).
藤原北家の総帥だった藤原忠平は宮廷の儀式作法に関心が深く、先例を尊重して儀式を行ったことは『貞信公記』にも詳細に記載されている。