of the Democratic Party of Japan suggested that textbooks were about to be published that could overthrow the principle of the education of Japan. He characterized these textbooks as: Intentionally and unwarrantably depicting the life of the working class of Japan as extremely horrible, so that it seems to be a product of the defects of the social system and of the self-contradiction of capitalism. Extolling the Soviet Union and the Republic of China (the People's Republic of China was not officially recognized at the time) very emphatically and seeming to suggest that Japan should be subservient to them. In addition, from August to October of the same year, the Japan Democratic Party published three volumes of booklets entitled "Ureubeki Kyōkasho" (, deplorable textbooks). The first volume listed four types of bias as "examples of biased education that appeared in textbooks": Ones that unconditionally support the labor union of teachers and the Japan Teachers Union, and advance their political activities: Miyahara Seiichi () ed., social studies textbook for high school, Ippan Shakai (), published from Jikkyo Shuppan (). Ones that hype how horrible the predicament of the Japanese workers are, and thereby advances a radical and destructive labor movement: Munakata Seiya () ed., social studies textbook for junior high school, Shakai no Shikumi (), published from Kyōiku Shuppan (). Ones that particularly glorify and extol the Soviet Union and the Republic of China, and castigate Japan: Sugo Hiroshi () ed., social studies textbook for 6th grade, Akarui Shakai (), published from Chuukyō Shuppan (). Ones that instill children with Marxist–Leninist, i.e. communist ideas: Osada Arata () ed., social studies textbook for junior high school, Mohan Chuugaku Shakai (), published from Jikkyō Shuppan (). The Japan Democratic Party condemned these textbooks as biased "red textbooks" (). In response to this, the authors and editors of the listed textbooks made various public statements and protest notes. However, the Japan Democratic Party did not reply. Since this incident a greater number of textbooks had been rejected as being biased (). The changes resulted in one-third of pre-existing textbooks being banned from Japanese schools. The Ministry of Education required that new textbooks avoid criticism of Japanese involvement in the Pacific War, and avoid mention of the Japanese invasion of China and involvement in the Second Sino-Japanese War at all. "Section F" purge Textbook screening in 1956, right after a change of the members of