When his second son Nobumasa MARIYA was born to his legal wife after he had handed over the real power in the clan to his illegitimate son Nobutaka MARIYA, vassals were divided into two groups of people who insisted the "legitimate son Nubumasa should be the successor" and another group of people who insisted "Nobutaka was already nominated as the successor and it shouldn't be changed".
だが、庶出ながら一人息子であった真里谷信隆に家の実権を譲った後に正室から次男真里谷信応が生まれると、「嫡出の信応を後継者とすべき」とする一派と「一度信隆を後継者と決めた以上は変えるべきではない」とする一派に家臣団は分裂してしまった。