The 1578 took place following the sudden death of Uesugi Kenshin. Kenshin had requested that the inheritance be split between his nephew, Uesugi Kagekatsu, and his adopted son Uesugi Kagetora. This conflict happened because of neither heirs being born with the Uesugi name. Kagekatsu was the biological son of Nagao Masakage and Kagetora was biological son of Hojo Ujiyasu. Before the situation could escalate into an armed conflict, Takeda Katsuyori acted as the mediator between those two. Therefore, eventually the Uesugi was divided for a military conflict. The Takeda supported Kagekatsu and the Hojo supported Kagetora. Thus, on March 17, 1578, Uesugi Kagekatsu led a force from his castle at Kasugayama to besiege Otate castle . Kagetora tried to return to Odawara but committed seppuku in Samegao Castle, and Kagekatsu claimed the full inheritance. Uesugi retainers who supported Kagekatsu Honjo Shigenaga Naoe Kanetsugu Jojo Masashige Saito Tomonobu Yasuda Akimoto Yoshie Munenobu Ogita Nagashige Irobe Nagazane Shibata Naganori Shibata Shigeie Suibara Chikanori Takenomata Yoshitsuna Uesugi retainers who supported Kagetora Uesugi Norimasa Aya Gozen Uesugi Kagenobu Saiponji Kagenaga Saiponji Sadanaga Kanamari Chikatsuna Kawada Nagachika Kaji Hidetsuna Momoi Yoshitaka Kitajō Takahiro Kitajō Hirotaka Ayukawa Morinaga See also Aya-Gozen Naoe Kanetsugu References Otate 1578 Otate 1578 1578 in Japan Conflicts in 1578