Unexpected violations of spatial logic and universal order characterize the work of Japanese designer . Playfulness, humor, and intentional ambiguity are abundant in his designs. In his poster "Victory 1945," which commemorates the thirtieth anniversary of the end of World War II, the folly of war is expressed simply by turning a shell back toward a gun. The optical illusion featured in his 1975 exhibition poster for the Keio Department Store is typical of his work.