In 1379, Yoshimasa rallied the anti-Yoriyuki shugo daimyo (feudal lords serving as provincial military governors) including Takahide and Yoriyasu TOKI and besieged Hana no Gosho (literally, Flower Palace), the Shogun's residence, by using arms to demand the dismissal of Yoriyuki.
康暦元年/天授(日本)5年（1379年）、義将は高秀や土岐頼康ら反頼之派の守護大名と糾合して兵を用いて将軍邸である花の御所を包囲し、義満に頼之の罷免を求めた。