Furthermore, he isolated Tadakatsu HONDA and Yasumasa SAKAKIBARA, of Tokugawa-shitenno (the four powerful generals serving Ieyasu TOKUGAWA), from the core of his control after the Battle of Sekigahara, and abolished the family of Tadachika OKUBO, a distinguished military group member almost equivalent to these two persons, through the Okubo Nagayasu incident, and made him lose his power.
さらには、徳川四天王である本多忠勝や榊原康政を関ヶ原の戦い後に中枢から隔離し、この2人に匹敵するほどの武功派であった大久保忠隣を大久保長安事件で改易・失脚させている。