Ujinori then approached Mitsutaka ASHIKAGA (Mochiuji's uncle) and Mochinaka ASHIKAGA (adopted child of Mitsutaka and younger brother of Mochiuji), also gained Mitsuzumi IWAMATSU (Ujinori's son in-law), Ujiharu NAGAO, the Chiba clan, the Utsunomiya clan, the Oda clan, the Sagami Miura clan, the Takeda clan and Kokujin-shu (local samurai) over to his side and revolted against Mochiuji in 1416.
すると持氏の叔父にあたる足利満隆、満隆の養子で持氏の弟である足利持仲らと接近し、氏憲の婿にあたる岩松満純、長尾氏春、千葉氏、宇都宮氏、小田氏、相模三浦氏、武田氏や地方の国人衆なども加えて1416年に持氏に対して反乱する。