This paper summarizes the changes in learners’ consciousness while proceeding with a project as a team in project-based learning (PBL) in the Master’s Program in Educational Sciences, Okayama University. The project team in this program consisted of people coming from multiple nationalities and fields of specialty, with various ideas and holding different values. Therefore, to take advantage of diversity and expertise, grasp things from a broader perspective, and discover the possibilities of new research perspectives, we examined the PBL significance and issues pertaining to it considering the actual feelings of learners through PBL. Also based on real case in our team since we been through a lot of troubles and culture crush. We thought it was necessary to go. Therefore, we conducted a questionnaire survey for other learners and analyzed the results from the perspectives of both Japanese and international students. Finally, we discussed the PBL significance in this program and matters for the next year.