During the Japanese occupation of Korea (1910–1945), the Japanese saw chǎomǎmiàn in Chinese restaurants in Korea and named it chanpon, as the white soup seemed similar to the soup of chanpon to their eyes.
During Japan's control of Korea (1910–1945), the Japanese referred to chǎomǎmiàn as chanpon in Korean Chinese restaurants because the clear broth reminded them of the chanpon soup.