His mother was Neishi (寧子), the daughter of Saionji Kinhira [ja] (西園寺公衡) In his own lifetime, Kōmyō and those around him believed that he occupied the Chrysanthemum Throne from 20 September 1336 to 18 November 1348.

Despite lacking the sacred treasures, Prince Yutahito was enthroned as emperor, beginning the Northern Court.

On the 12th month, 21st day, Go-Daigo escaped to Yoshino, founding the Southern Court.

[2] In the Shōhei Reunification, Kōmyō and his companions were placed under house arrest in Yamato Province, in what is today the village of Nishiyoshino, Yoshino District, Nara.

[4] Unless otherwise noted (as BC), years are in CE / AD  * Imperial Consort and Regent Empress Jingū is not traditionally listed.