According to "Zoku Honcho-ojo-den," in addition to these four there were originally another five (FUJIWARA no Sanesuke, MINAMOTO no Sukeyoshi, TAIRA no Korenaka, FUJIWARA no Arikuni, and one other), and they were collectively called "Kugyo" (nine nobles).
また、『続本朝往生伝』には当時この4人の他に5名（藤原実資・源扶義・平惟仲・藤原有国、他1名は不詳）を加えた「九卿」が存在したという。