Emperor Go-Shirakawa was the 77th emperor of Japan, according to the traditional order of succession. His de jure reign spanned the years from 1155 through 1158, though arguably he effectively maintained imperial power for almost thirty-seven years through the insei system – scholars differ as to whether his rule can be truly considered part of the insei system, given that the Hōgen Rebellion undermined the imperial position. However, it is broadly acknowledged that by politically outmaneuvering his opponents, he attained greater influence and power than the diminished authority of the emperor's position during this period would otherwise allow.

The Hōgen rebellion was a short civil war fought in order to resolve a dispute about Japanese Imperial succession. The dispute was also about the degree of control exercised by the Fujiwara clan who had become hereditary Imperial regents during the Heian period.