Ryuichi Yamashiro studied at the Municipal Polytechnic Osaka, which he completed in 1938. He worked for a time for the store (Depāto) Hankyu Hyakkaten and then made in 1952 as a freelance graphic artist on their own. In 1958, he was responsible for the color scheme and the mural for the Japanese pavilion at the World Exhibition in Brussels in charge.
He has served as artistic advisor of the chemical plants Asahi, for Toshiba active and for other industrial companies. He was a guest lecturer at the Institute of Design in Kanazawa and a director of the Nippon Design Center.
In 1964 his most famous poster was: Hayashi-Mori on the documenta III in Kassel shown in the graphics department. The poster Hayashi-Mori he had designed for a campaign to protect forests (Forest Protection Movement) Hayashi-Mori means. "Hain - Forest". HAP Grieshaber has referred the poster in his view "the most beautiful poster in the world".
His works have received numerous awards, in 1957 and 1960, he received, among other things, the silver and bronze medals of the Art Director Club Tokyo and then numerous other national and international awards.