In July to August 1266, Regent Masamura, Sanetoki and Yasumori held 'shinpi no sata' (a secret meeting) at the house of Tokimune, who was rensho (assistant to the regent), to decide to return Shogun Imperial Prince Munetaka to Kyoto for conspiracy of rebellion.
文永3年（1266年）6月、連署時宗邸で執権政村・実時・泰盛による「深秘の沙汰」が行われ、謀反を理由に将軍宗尊親王の帰洛が定められた。