(b Manshu, Manchuria, 23 Feb 1934). Japanese printmaker and painter. From 1952 to 1953 he studied at the National Painting Association Fine Arts Research Institute. In 1955 he met the painter Kyu Ei, and in 1956 he became a member of Ei’s Demokurato Bijutsuka Kyokai (Democratic Art Society), a group of avant-garde artists. Although at that time he was creating paintings such as Ruined Town (1955; Tokyo, Met. A. Mus.), in 1956 he began on Ei’s recommendation to produce copperplate etchings. He won prizes at the second, third and fourth Tokyo International Print Biennales, including ones for the drypoints Wedding Ceremony of Animals (1962; Tokyo, Met. A. Mus.) and Woman Applying Make-up (1964; Tokyo, N. Mus. Mod. A.). In 1961 he received the Award of Excellence at the Deuxième biennale de Paris, an exhibition of young artists. In 1965 a one-man exhibition of Ikeda’s prints was held at MOMA in New York, and a year later he received the Grand Prize in the print section of the Venice Biennale. In 1972 he settled in New York. In 1983 the exhibition Erosu ni Sasagu—Ikeda Masuo no Shirarezaru Sekai (‘Consecration to Eros—the unknown world of Ikeda Masuo’) was held at the Ikeda Museum of 20th Century Art in Ito. His style was initially abstract but it later became figurative.