In cooperation with his brothers Yoshikata MIYOSHI (Awa), Kazumasa SOGO (Sanuki) and Fuyuyasu ATAGI, he beat the forces of Nagamasa KIZAWA (in the battle of Taihei-ji Temple) and Nagamasa MIYOSHI one after another, both of whom had been his father's enemy.
弟の三好義賢（阿波）や十河一存（讃岐）、安宅冬康（淡路）らと協力して、木沢長政（太平寺の戦い）、三好政長らの父の仇の敵勢力を次々と破った。