This paper proposes a framework for web-based language learning support systems designed to provide customizable pedagogical procedures based on the analysis of characteristics of both learner and course. This framework employs a course-centered ontology and a teaching method ontology as the foundation for the student model, which includes learner knowledge status and learning preferences. A prototype system has been developed based on this framework. The system was evaluated by means of analysis of learner data from the international language department of a Chinese university. The average learning achievement of the students in the experimental group, who studied with the learning support system, was significantly better than that of the control group, who studied with the tradition learning management system while taking the same Japanese course as the experimental group.