The controversies primarily concern the nationalist right efforts to whitewash the actions of the Empire of Japan during World War II.
The history textbook controversies have been an issue of deep concern both domestically and internationally, particularly in countries that were victims of Imperial Japan during the war.
Despite the efforts of the nationalist textbook reformers, by the late 1990s the most common Japanese schoolbooks contained references to, for instance, the Nanjing Massacre, Unit 731, and the comfort women of World War II,[2] all historical issues which have faced challenges from ultranationalists in the past.
Instead, the textbooks for all subjects in elementary, and both lower and upper secondary schools are written and published by several major private companies.
This system was introduced to Japan after World War II to avoid the government having direct authority over the written contents.
The Textbook Authorization and Research Council (教科用図書検定調査審議会), an official council of the Ministry of Education, composed of university professors and junior high teachers, checks the draft in accordance with the Ministry's educational curriculum guidelines (学習指導要領) to ensure that the contents of the proposed textbook are "objective, impartial, and free from errors."
The Ministry of Education will give the company that authored the textbook the opportunity to revise the draft when it is found to contain information that is inconsistent with national guidelines.
Moreover, during the Cold War, the Ministry rejected textbooks by left-leaning publishers which attempted to portray the Soviet Union, mainland China, North Korea, and other Communist countries in a positive light.
Defenders also point out that during the 1960s and 1970s, the extent of the atrocities, as well as the existence of many of the incidents, were still being debated by Japanese historians; therefore, the Ministry of Education was correct in rejecting references to specific atrocities such as the Nanjing Massacre during that era, but the Ministry finally insisted on the inclusion of those same incidents after Japanese historians had finally reached consensus during the 1990s.
[12][13] On June 26, 1982, the Japanese textbook authorization system became a major diplomatic issue for the first time when Asahi Shimbun reported that the Ministry of Education demanded a textbook, which stated that the Japanese army invaded (侵略) Northern China, be rewritten using the phrase "advanced (進出) into" instead of invaded.
In response, on August 26, 1982, Kiichi Miyazawa, then the Chief Cabinet Secretary of Japan, made the following statement: Despite the widespread attention that the issue received in both the Japanese and international media, investigations done in September 1982 reveal that the alleged change never actually took place, that the ministry of education did not even make a recommendation for the change, and that the entire incident was caused by hasty and inaccurate reporting by a small group of journalists assigned to cover the Ministry of Education.
[15] In November 1982 the Ministry of Education adopted a new authorization criterion, the so-called "Neighboring Country Clause" (近隣諸国条項): Textbooks ought to show understanding and seek international harmony in their treatment of modern and contemporary historical events involving neighboring Asian countries (近隣のアジア諸国との間の近現代の歴史的事象の扱いに国際理解と国際協調の見地から必要な配慮がされていること).
[20] In 2007, former education minister Nariaki Nakayama declared he was proud that the Liberal Democratic Party had succeeded in getting references to "wartime sex slaves" struck from most authorized history texts for junior high schools.
Okinawa governor Hirokazu Nakaima spoke to the crowds, commenting that the Japanese military's involvement in the mass suicides should not be forgotten.
[24] A comparative study begun in 2006 by the Asia–Pacific Research Center at Stanford University on Japanese, Chinese, Korean and US textbooks describes 99% of Japanese textbooks as having a "muted, neutral, and almost bland" tone and "by no means avoid some of the most controversial wartime moments" like the Nanjing massacre or to a lesser degree the issue of comfort women.
The project, led by Stanford scholars Gi-Wook Shin and Daniel Sneider, found that less than one percent of Japanese textbooks used provocative and inflammatory language and imagery, but that these few books, printed by just one publisher, received greater media attention.