It was not an absolute condition to have the three sacred emblems of the Imperial Family for Imperial succession at that time, enthronement followed the example of Emperor Gotoba's enthronement after receiving a command from ex-Emperor Goshirakawa, without having the three sacred emblems of the Imperial Family.
三種の神器がない状況での即位は後鳥羽天皇が後白河天皇の院宣により即位した先例に従ったものであり、この時代は三種の神器が皇位継承の絶対条件ではなかったのである。