Tadaoki collaborated with Yoshiaki ASHIKAGA, Nobunaga ODA, Hideyoshi TOYOTOMI, and Ieyasu TOKUGAWA, the powerful people of the era, and is built the foundations of the HOSOKAWA clan which still survives today.
足利義昭、織田信長、豊臣秀吉、徳川家康と、時の有力者に仕えて、現在まで続く細川氏の基礎を築いた人物である。