Yoshiaki MOGAMI had a deep hatred for Hideyoshi and the Uesugi clan, becauase he was infuriated by the decisions made by Hideyoshi and because he was grievously shocked by the death of his daughter Komahime, who was a concubine of Hidetsugu TOYOTOMI and, as instructed by Hideyoshi, executed in the Hidetsugu Incident.
この裁定と秀次事件における駒姫の死とが重なって、最上義光は秀吉や上杉氏に対して深い憎悪の念を抱いた。