This paper discusses the origin of the notion of two-stage revolution in Japan and its development by a member of Japan’s communist party, Nosaka Sanzo. The Communist International stipulated the task of Japan’s two-stage revolution in 1927. In the following years Nosaka Sanzo creatively developed the connotation and the nature of the two-stage revolution in Japan based on his comprehension of the economic and political features of imperial Japan. I begin my narrative on how Nosaka came to understand the labor problem in Japan’s imperial economy in the 1910s, and continue by outlining how he developed this idea as a criticism of the Japanese empire from 1927 to 1945. The research will contribute to the understanding of the communist movement in imperial Japan. / Graduate