Born in 1939 in Kamaishi City, Iwate Prefecture, Ryohei Kojima graduated from Asagaya Art School in 1959 and Musashino Art Junior College in 1961. He initially worked in the advertising department at Ginza San’ai before joining Light Publicity Co. in 1963. After 12 years with the creative agency, Kojima established his own design studio, Ryohei Kojima Design Studio, in 1975.