By integrating computer technology with graphic design, Mitsuo Katsui could be called the first person to carry out the graphic design with technical means such as printing and computer in Japan. Regarding works of Mitsuo Katsui, the composition form is novel and unique. The optical illusion principle and gradient composition technique are expertly employed to create the unique visual experience and aesthetic pleasure. The brilliant colors just as the sunshine decomposed into spectrum are often applied to create the colorful and unreal color connection through the gradient iridescence. As to artistic conception, the unique ethnic spiritual temperament with plain and simple images are usually adopted, which are full of rich Zen implications.