Keizo Matsui was born in Hiroshima city. After graduating in Osaka University of Arts he left Yokohama port and, via Moscow, went to Russia by Tran-Siberian Railroad as well as various parts of Europe and, from Greece, explored the Mediterranean Sea and walked through Silk Road. Through Turkey, Iran, Afghanistan, Pakistan, India, Myanmar, Thailand and Hong Kong, he traveled a long way to Taiwan and then to Japan by ship, train and bus pondering upon what should be manifested upon the culture of his own country.
He opened a design studio in Osaka and later an atelier in New York. He worked as a design consultant for Apple Computer and made various symbols including the symbol for government publicity of Japan (used by the Cabinet Office, Ministries and all other government offices) and the symbol for Kansai International Airport Co., Ltd.
In the World Competition Grand Prix that is held in various parts of the world, he received the Gold Award and First Prize. He was also invited as one of the judges of those competitions (held in Helsinki, Moscow, Shenzhen, Brno, etc. etc.). In Japan, he was awarded with Tokyo ADC Prize, Package Design Award, Gold Prize, Silver Prize as well as many other awards both in Japan and abroad. He was invited to hold personal exhibition in Tokyo GGG Gallery, Osaka DDD Gallery, Museum fur kunst und Gewerbe Hamburg(Germany), Puebura Art & Design Museum(Mexico), and the Museum of Architecture Buenos Aires (Argentina).
Currently, he is a member of AGI, Tokyo ADC, JAGDA, and Japan Package Design Association while being a professor at the Osaka University of Arts.