Emperor Go-Fukakusa (後深草天皇, Go-Fukakusa Tennō, June 28, 1243 - August 17, 1304) was the 89th emperor of Japan, according to the traditional order of succession, and reigned from February 16, 1246 to January 9, 1260.
His personal name was Hisahito (久仁). He owes his reign name to his tomb, located in the Fukakusa district of Kyōto.
He was the fourth son of Emperor Go-Saga, his predecessor. His mother was Fujiwara (Saionji) no Kisshi (Omiya In). He had many children, among them the future emperor Fushimi and prince Hisaaki, eighth shogun of Kamakura.
Empress and Consorts :
Go-Fukakusa became emperor in 1246, at the age of two, following the abdication of his father Go-Saga, who then began his reign as a retired emperor.
In 1260, forced by Go-Saga, he abdicated in his turn, at the age of fifteen, in favor of his younger brother, emperor Kameyama.
After the enthronement of Emperor Go-Uda, Go-Fukasaka, through Saionji Sanekane, negotiated with the Bakufu for his son Hirohito to be named crown prince,
which subsequently led to a reign by alternating between the two lines of the Jimyōin-tō (the descendants of Go-Fukakusa) and the Daikakuji-tō (the descendants of Kameyama).
In 1287, Hirohito ascended the throne as Emperor Fushimi and Go-Fukakusa began to rule as a retired emperor until 1290 when he became a monk and retired from that position.
With his seventh son, the imperial prince Hisaaki becoming, among other things, the eighth shogun of Kamakura, the position of the Jimyōin-tō line was only strengthened.