This document discusses Japan's colonization of Korea from 1910 to 1945 and defines "chinilpa", which refers to Korean collaborators with the Japanese colonial government. It provides context on Japan's suppression of Korean culture and details of the colonization period like the Unit 731 biological weapons experiments and comfort women system. The document also examines laws in South Korea that define chinilpa and reclaimed land from them. In conclusion, it reflects on Korea's traumatic past during the Japanese colonial period.