Shuji Imamoto (今本 秀爾, Imamoto Shūji) is a Japanese ecological "green" activist and journalist. He has represented the green political movement in Japan since his attendance in Global Greens Conference in Canberra in 2001. As a researcher, his major field is modern European political and social philosophy such as Critical Theory of the Frankfurt School (Habermas, Erich Fromm), Critical Rationalism (Karl Popper), political pluralism (Hannah Arendt), political liberalism and existentialism (Jaspers, Sartre).