It is clearly evidenced by the hideous unethical crimes they did during the project for building "underground imperial headquarters" in Matsushiro of Japan.

They planned to construct the "headquarters" under the pretext of protecting the Japanese king from bombing of the allied forces in the Pacific War and started this project in November 1944.

In order to keep the project secret, they took a large number of Koreans to it. Under the worst living conditions, those Koreans had to suffer from slave labor of over 17 hours a day.

The Japanese imperialists shot to death or threw down escapees from a cliff and even made them kneel down in an iron box and put gravel, lime and water into it to death.

During the project, many Koreans were cruelly killed under the pretext of keeping secret. Among them were more than 180 persons engaged in the construction of bedroom for the Japanese king.

The "underground imperial headquarters" in Matsushiro was a den of brutes, constructed at the blood of Koreans, and a living hell of death.

The Korean people will never forget such extra-large crimes of the Japanese imperialists who had run amuck to obliterate other nation until the day of their defeat, and take revenge on them a thousand-fold.