Hanagura no Ran
In 1536, when the head of the Imagawa clan, Imagawa Ujiteru, died of illness, Imagawa Yoshimoto went to war against his older brother Genkô Etan for control of the clan. This succession dispute is known as the Hanagura no ran. With the military assistance of Hojo Ujitsuna of Sagami province and the support of Takeda Nobutora of Kai province, Yoshimoto became victorious over his older brother, and gained control of the clan.
- Kanaya, Shunichiro, Sengoku Jidai ga Omoshiroku Wakaru Hon, (戦国時代が面白くわかる本) Japan, 2003