Ichijo was 7 years old and obviously did not have a son, and since Ichijo was Enyu's only son, the Crown Prince had to be selected from among Reizei's sons, and because Reizei's second son, Okisada, whose mother was Kaneie's daughter FUJIWARA no Choshi, a Ryoto tetsuritsu situation arose.
まだ7歳の一条に当然皇子はなく、また一条は円融の唯一の皇子であったから、皇太子は冷泉の皇子から選ぶほかなく、兼家の娘藤原超子が産んだ冷泉の第2皇子居貞が皇太子となり、ここに両統迭立の状況が出現した。