Tadanori Yokoo is a Japanese graphic designer, illustrator, printmaker and painter.

Born in Nishiwaki, Hyōgo Prefecture, Japan, in 1936, he is one of Japan's most successful and internationally recognized graphic designers and artists. In the late 1960s he became interested in mysticism and psychedelia, deepened by travels in India. Because his work was so attuned to 1960s pop culture, he has often been (unfairly) described as the "Japanese Andy Warhol" or likened to psychedelic poster artist Peter Max, but Yokoo's complex and multi-layered imagery is intensely autobiographical and entirely original.