細川忠興

Hosokawa Tadaoki (tea name: Sansai) was one of the supreme sword collectors of the Sengoku period, a man who served all three of Japan's unifiers — Nobunaga, Hideyoshi, and Ieyasu — and survived them all to die at eighty-three. He was one of the Seven Masters of Sen no Rikyū's tea school and his wabi aesthetic deeply shaped his approach to swords: he sought blades of refined simplicity alongside those of supreme technical achievement. His most celebrated sword, the Kasen Kanesada, earned its disturbing name when Tadaoki reportedly used it to behead a man of culture (kasen) who had arrived late to a tea ceremony. He was also the husband of the Christian martyr Gracia (Hosokawa Tama), the daughter of Akechi Mitsuhide, whose death on the eve of Sekigahara was one of the Sengoku era's greatest tragedies. His sword collection — including works by Masamune, Sadamune, Yoshimitsu, and Samonji — was second only to Hideyoshi's in quality and remains partly preserved in the Eisei-Bunko Museum in Kumamoto today.