Research on Academic Identity of Suh Doo Soo -Japanese Literature Lecturer of Keijo Imperial University- Suh Doo-soo is the first Korean who majored Japanese literature at Keijo Imperial University. From 1937 to 1945, he was a professor at Ewha Seminary for Young Ladies, the former Ewha Womans University. When he was in Ewha Seminary for Young Ladies, he was active in doing academic works along with giving lectures on Japanese literature. After Korea's liberation from Japanese colonial rule in 1945, he transferred his specialty from Japanese literature to Korean literature and taught Korean literature at Seoul National University. In 1949, he went over to America, received a doctorate in Education Administration from Columbia University, taught Koreanology(Korean literature), and passed away in Boston, USA. As Professor Suh's academic works are different in stages, the evaluation of him should be different in stages, too. In the initial period of time, 1930-1939, he focused on his academic identity mainly as a Japanese literature researcher as well as a Korean literature researcher, too. In the secondary period of time, 1940-1945, he had a strong sense of Japanese literature researcher identity. In the tertiary period of time, 1945-1949, he strengthened his academic identity as a Korean literature specialist, and in the quaternary period of time, after 1950, he had an identity as a pioneer in Koreanology(Korean literature) abroad. In that sense, his academic identity is rather variable and multi-faceted than static.