The purpose of this study is to investigate and reflect on the pro-Japanese activities of Choe Seunghui, also known as Sai Shoki (1911-1969) during the Japanese colonial period. I reviewed literature including the Dictionary of Pro-Japanese Figures and documents from the Investigation Committee on Pro-Japanese Collaborators, as well as newspaper articles. Choe Seunghui's pro-Japanese activities from 1937 to 1944 included: first, donating large sums of money to national defense funds and pro-Japanese organizations; second, performing numerous consolation shows for the Imperial Japanese Army; and third, receiving the National Cultural Award for her pro-Japanese work Muhon. Immediately after liberation, Choe exhibited a process of denial, acknowledgment, atonement, and justification regarding her pro-Japanese actions. The study discusses her own stance on her pro-Japanese activities, the positions of South and North Korea, and the perspectives of the South Korean dance community after the lifting of restrictions on her works, highlighting the gap between 'facts' and 'acknowledgment.' In conclusion, the study emphasizes the importance of remembering both Choe Seunghui's pro-Japanese misconduct and her contributions to dance. As Hannah Arendt insightfully noted, the phenomenon of 'thoughtlessness' leading to immense evil can occur not only in past instances like Nazism or pro-Japanese collaboration but also in contemporary contexts. This study aims to assist the dance community in existing as reflective individuals, aware of these historical lessons.