Seiu Ito (????, Ito Seiu), also romanised as Seiyu Itoh (3 March 1882 in Tokyo – 28 January 1961 in Tokyo) was a Japanese painter, recognised today as "the father of modern kinbaku".
Ito's life was the subject of director Noboru Tanaka's 1977 Nikkatsu Roman porno film Beauty's Exotic Dance: Torture!, the final entry in his "Showa Era trilogy".