Yasunao Tone (b. 1935, Tokyo; d. May 12, 2025) was one of the first Japanese artists active in composing events and improvisational music. He is one of the founding members of Japan's Fluxus movement and has also been an organizer and participant in many important music and performance groups such as Group Ongaku, Hi-Red Center, Team Random (the first computer art group organized in Japan). Primarily a composer, Tone has worked in many media, creating pieces for electronics, computer systems, film, radio and television, as well as environmental art. He is a pioneer in the use of prepared CDs.