In regard of learning foreign languages, learners`` psychological traits have such an important influence on the results of learning. In order to analyze Korean undergraduates``(majoring in Japanese Language) psychological traits in regard of learning Japanese language, this study analyzed the individual and psychological traits of total 341 undergraduates. Also, the differences in anxiety in learning foreign languages and learning failure tolerance in accordance with the individual traits were compared. In the results, as the general characteristics of learners, 83.9% of the respondents are the students of College of Humanities and also 69.8% of them are majoring in Japanese Language. In the results of the psychological traits in accordance with the individual traits, female students feel tension and fear more than male students while male students show more self confidence and comfortableness than female students. The students with major in Japanese language, the experience in visiting Japan, the certificate of Japanese language, and high interest in Japanese language feel confident and comfortable more than the students without them. In the results of the analysis on the learning failure tolerance, male students can cope with the feelings about failure better than female students while female students can cope with them in the behavioral aspect better than male students. Depending on the matter of major, the students who are not majored in Japanese language can cope with failure better in the preference of task level. The students with the experience in prerequisite learning and the experience in visiting Japan have stronger failure tolerance in the aspects of behavior and preference of task level than the students without them. The students with the certificate and the hope to get a job related to Japanese language have stronger failure tolerance in the sub factors of behavior and preference of task level. The students with high interest in majoring in Japanese language show higher in the factors of behavior and preference of task level than the students without it.