At first, Yasumasa SAKAKIBARA, Ieyasu's vassal, undertook the mediation for the Ukita family, but because he tried to conduct the mediation with the integrity of Mikawa people, which was not in the interest of the Tokugawa family, Ieyasu deliberately provoked Yasumasa to return to the Kanto region by saying 'You probably want reward money,' and conducted the mediation himself.
なお、宇喜多家の調停は最初、家康の家臣である榊原康政が請け負ったが、三河者の律儀で徳川家の利益にならない調停を行おうとしたため、家康が「あれはおそらく礼の金が欲しいのであろう」と言い、榊原康政をわざと怒らせて関東に帰らせ、家康自ら裁断を下したという。