In this study, based on the natural discourse data obtained from group discussions in both language of Korean and Japanese showed overlapped phenomenon and the study was conducted as follows; 1) To compare the frequencies in both Korean and Japanese language that overlaps by analyzing the discourse. 2) To compare the style of each country``s discourse by analyzing the differences in cultural communication discourse of both languages. Also, the study was conducted to look into the effect of native language that are made of foreign language discourse. Consequently, [1] Japanese native speaker had higher frequency level in same cultural communication overlap. [2] In discourse of different cultural communication that was done through foreign language, compared to Japanese speaker, Korean native speaker showed higher tendency of using overlap.