Uesugi Kagetora

Brother of Hōjō Ujimasa and adopted son of Uesugi Kenshin, also recorded as Hōjō Ujihide. After Kenshin's death in 1578, he contended for leadership with another adopted son, Uesugi Kagekatsu, resulting in the Otate Conflict. Ujimasa's support for Kagetora was not mere intervention in Echigo's internal strife but reflected the Hōjō's northern strategy. However, when Takeda Katsuyori supported Kagekatsu, it provoked renewed conflict between the Hōjō and Takeda.

Sources　おだわらデジタルミュージアム「北条氏政」／小田原市「四代氏政の時代」／おだわらデジタルミュージアム「北条氏直」／小田原市「五代氏直の家督相続」／小田原市「小田原合戦」／小田原市「北条氏五代100年の歴史」／小田原市「北条氏ゆかりの地を訪ねる」／国立国会図書館サーチ『北条氏政：乾坤を截破し太虚に帰す』