History tends to memorialize the stars and leaders, yet both musical and social movements are also made possible by people who work in the background, organize, seed trends, and otherwise help make things happen. The Japanese rap pioneer and activist ECD, who passed away on January 24, 2018, was neither the earliest nor most commercially successful rapper, and he would have eschewed calling himself a leader of any protest group. Nonetheless, he was what Gramsci would have called an organic intellectual of the working class. The frankness of his music, writing, and performances touched his audiences at an affective level, connecting them to the movements in which he participated. This article looks back at his life, which embodied the worlds of hip-hop, contentious politics, and the working class. It also examines his songs, which not only convey a vivid account of his life, but also reflect his personal and political concerns as well as the ambience of street protests. ECD was a key figure in the development of the underground hip-hop scene, organizing events that allowed it to take root and be lifted into commercial viability. He was on the front lines of several Japanese social movements—anti-Iraq War, anti-nuclear power, anti-racist, pro-democracy, and anti-militarization. He wrote protest anthems, inspired Sprechchor, performed at protests, and helped to establish a new mode of participatory performance, which engaged protesters more fully. His sheer presence at demonstrations, constant and reliable, energized and reassured protesters. Part I describes his years as a hip-hop pioneer, and Part II portrays his role in Japanese social movements of this century.