In the late Heian period, the dispute about Imperial succession to the Retired Emperor Toba happened, Emperor Sutoku, Emperor Konoe, and Emperor Goshirakawa, between brothers, opposed to each other, but, it was settled by armed conflict after the Hogen War, the Heiji War.
平安末期になると、鳥羽上皇の後継をめぐって崇徳天皇、近衛天皇、後白河天皇の兄弟間による皇位承継紛争が保元の乱・平治の乱という武力衝突により解決されることとなった。