When Go-Fukakusa ascended to the throne in 1246 at the age of four, his father Go-Saga continued to rule from his position of Retired Emperor.

Go-Fukakusa appealed to the shogunal administration in the city of Kamakura and had his own son (later known as Emperor Fushimi) named next in line after Go-Uda.

But, with his seventh son, Imperial Prince Hisaaki becoming the 8th Kamakura shōgun among other things, the position of his Jimyōin-tō became strengthened.

Kugyō (公卿) is a collective term for the very few most powerful men attached to the court of the Emperor of Japan in pre-Meiji eras.

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