An essay is presented on the leftist post-war Japanese history book "Shōwashi," by Tōyama Shigeki, Fujiwara Akira, and Imai Seiichi. It says that the book uncovers the meaning of war in the analytical framework of Marxist and urges an anti-war message, which appealed readers in early post-war Japan. It discusses the production of the book including the idea for its publication, authorship, and selection for its title. It explores the issue it raised for being a history book.