Mitsuo Katsui was born in Tokyo in 1931. After graduation from Tokyo University of Education, he joined Ajinomoto in 1956 and founded his own studio in 1961. He was art director of the Japan World Exposition in Osaka (1970), the International Ocean Exposition in Okinawa (1975), and the International Exposition of Science and Technology in Tsukuba (1985). He is Professor Emeritus at Musashino Art University. Mitsuo received of numerous awards, including: Tokyo ADC Members Award, Mainichi Design Award, Kodansha Publishing Cultural Award, Katzumie Masaru Award, Minister of Education Art Incentive Award, Japanese Government Medal with Purple Ribbon, N.Y. ADC Gold Prize, Gold Prize at Lahti International Poster Biennial, Gold Prize at Brno Biennial of Book Design, Grand Prix at Poster Biennial of Mexico, and Gold Prize at Warsaw International Poster Biennial.