細川忠興
His chanoyu mentor was Isa Kōtaku (1684–1745), a disciple of the Rinzai Zen monk Ikei Sōetsu (253rd abbot of Daitokuji temple, Kyoto, and later, founder of Kōgen'in temple in Edo [Tokyo]), who was in turn a disciple of the daimyō and chanoyu master Katagiri Sadamasa Sekishū (1605–73). He was also privy to a copy of the "Nanpōroku" ()　record of the chanoyu teachings of Sen no Rikyū, from Arai Itsushō (1726–1804), who was a tea devotee in Edo in the chanoyu tradition of Hosokawa Tadaoki (a.k.a. Hosokawa Sansai).