It is said recently that the clan collapsed because the economy of the territories worsened due to frequent wars by his father Yoshimoto rather than because Ujimasa was 'incompetent' as was generally rumored.
滅亡の原因は、一般的に言われている氏真の「無能」ぶり以上に、父・義元の度重なる外征がもたらした領国内の疲弊が深刻であったため、と近年では言われている。