1554: The Formation of the Kai-Sagami-Suruga Triple Alliance - Sengoku Shogun Map
Takeda Harunobu, Hōjō Ujiyasu, and Imagawa Yoshimoto formed the Kai-Sagami-Suruga Triple Alliance, sealed through a series of marriages between their children. With this pact among three eastern daimyo who had long fought one another, each lord was freed from worrying about his rear, allowing them to concentrate their strength on northern Shinano, the Kantō, and Owari respectively.
Major events
- 1554-月日不詳: Kai-Sagami-Suruga Alliance Is Formed — The Takeda, Hōjō, and Imagawa established an alliance through marriages among their children.