The summary of the core which has been analyzed and compared is as follows. First, when we add his first and second time of studying in Japan together, Lee, Gwang Soo studied in Japan for about seven years and eight months. The period of Lee, Gwang Soo's studying in Japan is five years and seven months longer than that of Natsume Soseki. Therefore, it is considered to have better possibility that Lee, Gwang Soo learned more about Modern Knowledge through Japan and understood the Japanese culture better in details than Natsume Soseki did. Socond, Natsume Soseki didn't go to England to study at University and take lectures, it looks like that he learned England poetary and literature paying a visit once a week to a reseacher named Greig, who specialized in Shakespeare. However, Lee, Gwang Soo was officially admitted to Maizi and studied Philosophy at the university and he had also finished the junior high school course in the same school. He acquired the knowledge from school, taking lectures. So to speak, there is a difference in the way they took their study. Natsume Soseki learned through private teaching in England, and Lee, Gwang Soo obtained his knowledge through official school course in middle school and at university. Third, Natsume Soseki stopped learning from professor Creig and tried to finish an ambitious project about the subject of 「What is Literature」all alone in a rented room. The notes which he took when he studied in England were arranged in his book, 「 Literary Theory」. On the other hand, Lee, Gwang Soo published a short story, 「Is it Love(愛か)」, written in Japanese at his first time of studying in Japan. At the second period of his studying there, he was highly acknowledged after he brought out his first full-length of novel, 「Heartlessness」, which marked an epoch in Korean history of Modern Literature. Compared with Natsume Soseki who concentrated on the Literature study alone in his rented room during his study in England, Lee, Gwang Soo won great recognition after publishing works as a writer during his studing in Japan. Fourth, Natsume Soseki became disillusioned after perceiving the contradiction and ill effects of Western culture and civilization when studying in England, whereas Lee, Gwang Soo watched his mother country being colonized by Japan and aspired that Western civilization would be quickly introduced into his homeland through Japan and modernization of his homeland could be realized. There we could find another difference between them. Fifth, the Life of Natsume Soseki in London was far from stability that he could have gotten from taking lectures faitfully from professors at school in settled surroundings; however, his variegated knowledge, writing materials and others were acquired from his shabby rented room. Most of Lee, Gwang Soo's works, as well as 「Heartlessness(無情)」 and 「Humaneness(有情)」 which Lee, Gwang Soo put out, are deeply related to the knowledge which he obtained through his experiences in Japan. The materials of his novels are mostly from his knowledge and experiences that he got when he studied in Japan. Judging from above, The experience of studying abroad Natsume Soseki and Lee, Gwang Soo are considered to trigger them to choose the lives as writers.