Kohei Saito (born 1987) is a Japanese philosopher and historian of economic thought. He is an Associate Professor at the University of Tokyo, where his research focuses on Marx, political economy, and environmental thought. His book "Karl Marx's Ecosocialism" received the Deutscher Memorial Prize, making him the first Japanese recipient, and "Capital in the Anthropocene" won Japan's Shinsho Grand Prize. His best-known book, "Capital in the Anthropocene," reexamines Marx's ideas in the context of the climate crisis and explores pathways toward a more sustainable society.