Abstract
This research investigates what types of verbs are found in the Oral Proficiency Interviews of 30 Korean learners of Japanese, whose proficiencies of Japanese vary (Superior, Advanced, Intermediate and Novice). The data was analyzed using a morpheme analysis program, 'ChaSen'. The following inference can be drawn from the results of the study: (1) The number of types and tokens of verbs increase as the learner's proficiency level goes up; however, more advanced learners repeatedly use the same verb, as can be explained by the greater difference between the number of types and tokens. (2) Learners at the higher proficiency level make use of the same verbs repeatedly, e.g., 'iu', 'suru', 'omou', 'aru', 'naru'. It seems that difference in usage of these verbs influences the learners' language acquisition process.
