Outliving his heir Yoshimoto KIRA, Yoshinobu transferred his family headship to his legitimate grandson Yoshitaka KIRA on November 8, 1516 (cf. "Muromachike Gonaishoan").
永正13年（1516年）10月4日、嫡子吉良義元に先立たれた義信は嫡孫吉良義尭に家督を譲る（『室町家御内書案』）。