Genpei Akasegawa
was a pseudonym of Japanese conceptual artist  (born 27 March 1937, died 26 October 2014). He started the art group Hi-Red Center with Jiro Takamatsu and Natsuyuki Nakanishi in 1963. Akasegawa helped to start the "Roadside Observation" art group (路上観察学会 in Japanese) with Terunobu Fujimori in 1986. He also created the word Tomason to describe a kind of found art. Tomason are parts of buildings that seem useless, but are interesting.