Jiro Yoshihara (吉原 治良, Yoshihara Jirō, January 1, 1905 – February 19, 1972) was a Japanese painter. In 1954, along with Shōzō Shimamoto, he co-founded the avant-garde Gutai group in Osaka. He was a businessman and scion of a family that owned a cooking-oil company, along with a group of young, Hanshin-region artists. Yoshihara had taught Western-style painting before becoming Gutai’s leader. Yoshihara wrote the "Gutai Manifesto" in 1956 and was the leader of the so named group of internationally acclaimed avant-garde artists representative of Japan's post-war art world. He worked in surrealist and abstract expressionist painting styles before turning, in his final years, to the repeated depiction of circles reminiscent of "satori," the enlightenment of Zen. This white circle was made by leaving the canvas unpainted while painting the background black. When asked about his circles, Yoshihara said that he could not manage to paint even one circle with satisfaction, an indication of the depths of his pursuit of this form. Indeed, no two of his circles are shaped exactly alike. He was the leader of the Gutai Group until his death in 1972.