On September 28th in the same year, in the midst of the incident, there was a rumor that Yoritsuna was plotting a rebellion, camouflaging it as if he had intended to visit Kamakura for support leading the vassals of the family, so Yoshitoki Hojo, OE no Hiromoto, and Kagemori ADACHI gathered at the residence of Masako HOJO and summoned Tomomasa OYAMA to discuss the matter.
その最中の同年8月7日、頼綱が一族郎従を率いて鎌倉参上を擬し謀反を企てているとの風聞があり、北条義時、大江広元、安達景盛らが北条政子邸に合し、小山朝政を召し出して評議が行われた。