after the death of the retired emperor toba in the middle of the 12th century , a political fight for the seat of chiten no kimi occurred , which involved the emperor ' s family and sekkan-ke , and was resolved after a military confrontation (the hogen war ). 12世紀中期に鳥羽上皇が没すると、治天の君の座を巡って天皇家・摂関家を巻き込む政争が起こり、軍事衝突によって解決した（保元の乱）。
although emperor heizei tried to keep the ruling power after abdicating the throne to his brother , emperor saga did not welcome it , which led to a serious conflict between the two , and finally a military confrontation , in which emperor saga won (kusuko incident in 810 ). 平城は弟の嵯峨天皇に譲位した後も執政権を掌握し続けようとしたが、それを嫌った嵯峨との間に対立が深まり、最終的には軍事衝突により嵯峨側が勝利した（810年、薬子の変）。
