Takakage, therefore, forced the Kuratani clan to adopt the son of Shugo Yoshiyasu SHIBA and made the adopted son proclaim himself Yoshitoshi ASHIKAGA, and then, to oppose the Shiba clan, which was the Shugo of Echizen Province, Takakage backed up Yoshitoshi as 'the nominal provincial lord of Echizen Province,' overcoming resistance from the bakufu.
すると、かつての守護斯波義廉の子を鞍谷氏の養子として足利義俊と名乗らせた上で、幕府の反対を押し切ってこの義俊を”名目上越前国主”として擁立し越前守護の斯波氏に対抗した。