Kazuo Shiraga (August 12, 1924 – April 8, 2008) was a Japanese abstract painter and the first-generation member of the postwar artists collective Gutai Art Association. As a Gutai member, he was a prolific, inventive, and pioneering experimentalist who tackled a range of media: in addition to painting, he worked in performance art, three-dimensional object making, conceptual art, and installations, many of which are preserved only in documentary photos and films.

Shiraga is best known for his abstract paintings, or the so-called “foot painting”, which he created by spreading oil paint initially on paper and later on canvas with his feet. Through this original method he had invented in 1954, he made a critical engagement with the tradition of painting, the result of which resonated with European and American gestural abstraction of the 1950s, such as Informel and Abstract Expressionism. In the 1960s and 1970s, he reintroduced tools such as boards and spatulas for spreading the paint.