Meanwhile, the 4th shogun, FUJIWARA no Yoritsune, who had left the capital for Kamakura in his early years, and worked as a puppet of the regent HOJO family, came of age, and wanted to hold the reigns of government, trying to organize the anti-regent power.
いっぽう、幼少時に鎌倉へ下向し、執権北条家の傀儡となっていた4代将軍・藤原頼経も成年に達し、自ら政権を握る意志を持ち、反執権勢力の糾合を図っていた。