Although Prince Iyahito was expected to enter Myohoin, after Yoshiakira ASHIKAGA of Kyoto discussed the situation with Yoshimoto NIJO, they asked for help for Kogimon-in, Prince Iyahito received the order to succeed to the throne and was enthroned as Emperor Gokogon in August 17, following the example of ancient Emperor Keitai who was enthroned after being appointed by Enshin (延臣).
弥仁は妙法院への入室が予定されていたが、京都の足利義詮は二条良基と相談の上、北朝再建のために広義門院に要請し、延臣に擁立されて即位した古代の継体天皇の先例も引照して、8月17日に弥仁は践祚され、後光厳天皇として即位。