After college, Katsui took postgraduate courses in design and photography. His skills advanced quickly, earning him exhibitions in Tokyo art galleries and jobs with commercial clients, such as Ajinomoto, a major food corporation. Katsui then convinced a large printing company to allow him to experiment with a new printing press that produced micron lines on banknotes. After two years of trial and error Katsui created an animated movie with the aid of the machine.