The Gutai group (具体； means "tangible; material; concrete") was an artistic movement and association of artists founded (according to most sources) by Jiro Yoshihara in Japan in 1954. According to the official website of Shozo Shimamoto, Shimamoto and Yoshihara founded Gutai together in 1954, and it was Shimamoto who suggested the name Gutai, which means (again, according to this source) “concrete” (as opposed to abstract/theoretical) [1].