Уэсуги Кагэкацу
In 1578, Katsuyori incurred the wrath of the Hōjō family by helping Uesugi Kagekatsu against Uesugi Kagetora who was Hōjō Ujiyasu's seventh son, adopted by and heir to Uesugi Kenshin and initiated the Battle of Omosu in 1580.