When Yoshizane died on August 25, 1481, Yoshinobu was in mourning for some time, and on January 24, 1482, he went to work for the Muromachi bakufu (Japanese feudal government headed by a shogun) for the first time after his succession to the family headship.
文明(日本)13年（1481年）7月21日に義真が没するとしばらく喪に服し、同年12月26日に家督相続後初めて幕府に出仕した。