It sometimes happened to urge Shogun to abdicate, but killing Shogun was so-called "prohibited strategy," so it can be said that it was a serious incident in which the existence of Hirashima Kubo let the Miyoshi clan move into the action.
将軍に退位を迫る事があっても、命を奪うまでの行為は言うなれば『禁じ手』であったが、平島公方の存在が実行に踏み切らせた一大事件でもある。