From the beginning of the Kamakura period, social turmoil such as natural disasters and war began to affect the aristocracy, and it was clearly apparent that the existence of the aristocracy itself was threatened when the Imperial Court forces were defeated and the retired emperor was exiled in Jokyu Disturbance.
鎌倉時代に入ると災害や戦乱などの社会的混乱が貴族社会にも及び始め、遂に承久の乱では朝廷軍が敗北して太上天皇の流罪が行われるなど、貴族社会が存続の危機に差し掛かっていることが明白となった。