Prince Morinaga, with his prestige and his devotion to the civilian government cause, was Takauji's natural enemy and could count therefore on the support of his adversaries, among them Nitta Yoshisada, whom Takauji had offended.[1] Tension between the Emperor and the Ashikaga gradually grew, until Takauji had Morinaga arrested on a pretext and first confined him in Kyoto, then transported him to Kamakura, where the Prince was kept prisoner until late August 1335.[2] The situation in Kamakura continued to be tense, with Hōjō supporters staging sporadic revolts here and there.[2] In the course of the same year Hōjō Tokiyuki, son of last regent Takatoki, tried to re-establish the shogunate by force and defeated Tadayoshi in Musashi, in today's Kanagawa Prefecture.[3] Tadayoshi had to flee, so before leaving he ordered the beheading of Prince Morinaga.[5] Kamakura was therefore temporarily in Tokiyuki's hands.[4] Heard the news, Takauji asked the Emperor to make him sei-i tai-shōgun so that he could quell the revolt and help his brother.[2] When his request was denied, Takauji organized his forces and returned to Kamakura without the Emperor's permission, defeating the Hōjō.[4][lower-alpha 1] He then installed himself in Kamakura's Nikaidō neighborhood.[8] When invited to return to Kyoto, he let it be known through his brother Tadayoshi that he felt safer where he was, and started to build himself a mansion in Ōkura, where first Kamakura shōgun Minamoto no Yoritomo's residence had been.[2]