They began ransacking bookshops, Confucian schools, lecture-halls and houses across the country by mobilizing gendarme and police from November 1910 to seize history books related with Tangun Korea and national classics.

More than 200,000 volumes of books were burnt away by them through the search operation.

They organized the "Society of Compilation of Korean History Book" involving pro-Japanese traitors of Korea and government-paid historians of Japan with the "superintendent-general of Political Affairs of the Government-general in Korea" as its chairman in June 1925 to publish "Korean History" (30 volumes in six parts).

In the book, they alleged that the history of Korea started in the period of Silla (early middle part of the 1st century to 935).

They also described the histories of the ancient states prior to the three kingdoms (Koguryo, Paekje and Silla) as those of primitive society or legendary ones. By fabricating the theory of "Mimana Miyake" (Japan's government agency of Imna), they asserted that the southern part of Korea had been under the control of Japan since the outset of its history.

In a bid to justify their allegation, they twisted even the contents of the monument to the Mausoleum of Kwanggaetho, a king of Koguryo.

In this way they erased nearly 3000 years in the history of the Korean nation in the book.

They also termed the history of the Korean people's struggle against foreign invaders one of their "subordination" to big powers of the Asian Continent and beautified the history of their Korea aggression.