When Takauji ASHIKAGA was defeated by the Southern Court and escaped to Kyushu, he went to the battlefield of Kita Kyushu in response to Sadahisa's invitation to defeat the Kikuchi clan, a local ruling family in Chikugo Province supporting the Southern Court.
足利尊氏が南朝(日本)に敗れ九州に落ち延びると、貞久の招きに応じて北九州に出陣し、筑後国の南朝方豪族・菊池氏を討つ。