In September 1158, the Emperor Nijo ascended the throne and the political arena was divided into two, one for the Insei (cloister government) by Goshirakawa and the other for direct administration by the Emperor Nijo.
保元3年（1158年）8月に二条天皇が践祚すると、政界は後白河院政派と二条親政派に二分される。