Emperor Reizei was a son born to Empress Anshi, eldest daughter of Morosuke, but Morosuke and Anshi were already dead, and Morosuke's sons, FUJIWARA no Koretada, FUJIWARA no Kanemichi, and FUJIWARA no Kaneie, were still young.
冷泉天皇は師輔の長女中宮安子が生んだ皇子だが、師輔も安子も既に亡くなっており、師輔の子の藤原伊尹・藤原兼通・藤原兼家たちは未だ若年だった。