1541: Takeda Harunobu Exiles His Father Nobutora and Seizes the Headship
While Takeda Nobutora, returning from a campaign in Shinano, visited his son-in-law Imagawa Yoshimoto, his heir Harunobu (the future Shingen), backed by senior retainers including Itagaki Nobukata, sealed the border between Kai and Suruga and effectively exiled Nobutora to Suruga. Amid growing resentment among retainers exhausted by Nobutora's repeated campaigns, Harunobu inherited the Takeda headship and the stewardship of Kai.
Events this year
7/19
Hōjō Ujitsuna, who had led the Hōjō forces against the Imagawa during the Kawatō Disturbance, died. His son, Ujiyasu, succeeded him to become the third head of the Hōjō clan.
Sources 小田原市「後北条氏5代」
Takeda Harunobu sent his father Nobutora into retirement in Suruga and succeeded to the Takeda headship and rule of Kai.