Genpei Akasegawa

Katsuhiko Akasegawa (赤瀬川 克彦, Akasegawa Katsuhiko; March 27, 1937 – October 26, 2014), known by his pseudonym Genpei Akasegawa (赤瀬川 原平, Akasegawa Genpei), was a Japanese artist and writer. In literary works, he also went by Katsuhiko Otsuji (尾辻 克彦, Otsuji Katsuhiko). A member of the influential artist groups Neo-Dada Organizers and Hi-Red Center, Akasegawa went on to maintain a multi-disciplinary practice throughout his career as an individual artist. He is also known for having coined the term and concept of Hyperart Thomasson and for having founded the Rojō Kansatsu Gakkai (路上観察学会; lit. 'Street Observation Society').

Akasegawa has had retrospective exhibitions at the Hiroshima City Museum of Contemporary Art, Chiba City Museum, and Oita City Museum. His work is in the permanent collection at Museum of Modern Art in New York. Artist Nam June Paik has described Akasegawa as "one of those unexportable geniuses of Japan".