It was ostensibly recorded that Fusasada persuaded Masamoto not to go to practice Shugendo (the Way of Mountain Asceticism) in Oshu (Northern Honshu, the region encompassing Mutsu and Dewa provinces) and to return to Kyoto; however, in recent studies, it was supposed that Masamoto came to request cooperation of Fusasada and his son Akisada in his plan to depose Shogun Yoshitane ASHIKAGA.
表向きは奥州に修験道の修行に行くという政元を房定が説得して京都に帰らせた事になっているが、近年では将軍足利義稙の廃立計画について房定及びその子・顕定の協力を求めに来たのではないかとも言われている。