There are a lot of problems caused by different cultures in human relations between Korean and Japanese. Those kinds of problems universally occur when people who come from different cultures contact each other. However, the previous Japanese learning system did not emphasis on those problems much but expected learners to be familiar with Japanese words and actions or custom. This article surveys what sort of problem can be arose for relations with questionnaire and examines problems caused by differences of words expressions and countermeasures against the problems. At first, a survey was carried out with questionnaire given to 100 Korean who had ever built relations with Japanese. As a result, it was mentioned as the biggest problem that Japanese are so introvert people. The survey also covers “Japanese individualism”, “recognition of friendship”, “ambiguous expressions” and “hypocritical speech and behavior”. The previously mentioned problems arise heterogeneity, which pressure unfamiliar learners and should be the main impediment to relations. The problems of relations would be sampled extensively and the solution process is supposed to be the part of Japanese educational system. (Chonnam National University)