The family troubles were caused by Hideie's problematic behavior, as well as other senior vassals' dissatisfaction with the autocratic administrative officials of the Ukita family, including Tsunanao OSAFUNE and Jirobe NAKAMURA.
原因は秀家の素行に問題があったことのほか、宇喜多家の執政であった長船綱直や中村次郎兵衛らの専横による他の重臣の不満。