According to the old book "Koryosa" (History of Koryo), Japanese gangsters intruded into Hamju, Hongwon, Pukchong and other areas between 1375 and early 1388 to kill and abduct local people. They kidnapped more than 1,000 people a day from Kanghwa Island.

Another old book "Sejong Sillok" (Chronicles of King Sejong) says that the Japanese intrusion became frequent in the closing years of Koryo, setting fire to towns, killing people and robbing their properties.

During the Imjin Patriotic War (1592-1598), Japanese troops took a lot of ceramic pieces and ceramists away from Korea.

Tailors, technicians, doctors, scholars, women and even children were victims of their abduction.

According to an understated figure released by Japan, the number of Korean abductees exceeds 100 000 in the period of the Imjin war.

Some of them were sold to Europe as slaves.

There were slave markets in Nagasaki, Hirado and Hakata ports.

The graves of Korean women in Shikoku, Tokushima and Kochi, old workplaces and graves of Korean ceramists in different parts of Japan and Korean towns built by them serve as a reminder of Japan's crimes.