There was a ceremonial investiture of the crown prince under the circumstance of having both Emperor Reizei and Emperor Enyu's sides in power by turns; the crown prince was called 'Sakasa no Moke no kimi' because he was eleven years old, four years older than the Emperor.
冷泉・円融天皇両系の迭立に基づく立太子であったが、東宮の方が天皇より4歳年上の11歳であったため、「さかさの儲けの君」といわれた。