Sori Yanagi was a Japanese product designer. He played a role in Japanese modern design developed after World War 2 to the high-growth period in the Japanese economy. He is both a representative of the wholly Japanese modern designer and a full-blown modernist who merged simplicity and practicality with elements of traditional Japanese crafts. After World War II, he designed many products: furniture, three-wheeled vehicles, Olympic cauldrons, pedestrian overpasses, etc. One of the most famous pieces of furniture is his Butterfly Stool.