Abstract
This is a report of a training course for Japanese volunteers aimed at improving problem-solving abilities. This course held 10 lessons, three hours per lesson and once per week. Nine volunteers who participated in the course reflected on their practice in volunteer Japanese classes and looked for the solution for some problems they noticed. According to the reflection sheet the participants wrote after every lesson, it revealed that they learned the importance of facilitating learner autonomy and of holding their own conclusions for problem-solving. Most of the participants found how important it was to study each other in a group through training course arranged on the based on group works.
