After the battle of Sekigahara, Tadaoki considered the importance of the relationship with the Tokugawa family, therefore he ordered a divorce of his legitimate son Tadataka HOSOKAWA and Tadataka's wife Chiyo (a daughter of Toshiie MAEDA) to end the Tokugawa family's vigilance.
関ヶ原の戦いの後、忠興は徳川家との関係を重視し、警戒を解くために嫡男・細川忠隆とその妻・千世（前田利家の娘）の離縁を命じた。