Shin'ichi Hisamatsu (久松 真一, Hisamatsu Shin'ichi?, June 5, 1889 – February 27, 1980) was a philosopher, Zen Buddhist scholar, and Japanese tea ceremony (sadō or chadō, 茶道, "the way of tea") master. He was also a professor at Kyoto University and received an honorary doctoral degree from Harvard University.