Sadaharu Horio (堀尾貞治, Horio Sadaharu, born April 5, 1939, in Kobe, died November 3, 2018, in Kobe) was a Japanese visual and performance artist. From 1966 to 1972 he was a member of the Gutai Art Association and produced sculptural canvasses. From the late 1960s on, his work increasingly included large-scale installation artworks, performances and interventions in urban and natural environments. His performances often spontaneously involved the audience in collective creative activities. Horio became a crucial figure in the formation of an alternative and open art scene in the Kansai region. His work is characterized by a strong connection between the act of painting and everyday life, his repudiation of distinction between high and low art, and the ease and humor with which he adapted his