He also usurped various authorities, such as those for rituals and for personnel affairs, from the Imperial Family. In April 1408, one month before his death, he carried out the ceremony of Genpuku (coming-of-age ceremony for boys) for his second son, Yoshitsugu, on a scale comparable to ceremonies for an imperial prince.
また祭祀権・叙任権（人事権）などの諸権力を天皇家から奪い、死の1ヶ月前の1408年（応永15年）4月には宮中において次男・義嗣の元服を親王並みに行った。