This study constructs a composition support system which provides users with co-occurring words extracted from technical science papers. The system supports Japanese language learners in their acquisition of case-making particles by providing them with co-occurrence examples of nouns and verbs involved in combination patterns with case-making particles and verb inflections. The system also supports Japanese learners in using appropriate expressions by providing alternative co-occurring verbs depending on the target corpus. The results of an evaluation study involving three conditions-using a limited set of verbs output by the system, using an electronic dictionary, and no support-indicated that the system provided the same level of information as the dictionary.
