Itsurō Sakisaka (向坂 逸郎, Sakisaka Itsurō) (6 February 1897 – 22 January 1985) was a Japanese Marxian economist and socialist thinker. A professor of economics at Kyushu University, he was a leading theoretician of the left wing of the Japan Socialist Party (JSP) and co-founder and long-time leader of the Socialist Association (Shakaishugi Kyōkai).
Source: “Itsurō Sakisaka”, English Wikipedia (CC BY-SA 4.0), excerpt