Marxist, environmentalist, and proponent of degrowth: these are the three pillars of the thought of Japanese philosopher Kohei Saito (Tokyo, 1987), who, thanks to essays highly critical of capitalism such as Slow down. A new way of living (2020; in Catalan in Tigre de Paper) has become best-seller —has sold over half a million copies in Japan alone— and has been translated into some twenty languages. The author recently visited the CCCB in Barcelona with a new book, Capital from scratch (Paper Tiger, 2025; translated by Lola Fígols), where he analyzes the growing discrediting of capitalist logic, puts forward some proposals to correct the present and offers an unusual look at Karl Marx's most important work, The capital