It was recorded that Kazunobu (和信) 'had long been known by Lord Katsutoyo (since before 1578),' and was formally employed in 1578 when Katsutoyo YAMAUCHI launched an attack against Nagaharu BESSHO, a lord of Miki-jo Castle in Harima Province.
和信は「一豊公前々（天正6年以前）より御存知に遊され」とあり、山内一豊が天正6年（1578年）播磨国三木城主別所長治攻めの際に初めて正式に召抱えられたとある。