This study is an evaluation of the professional development (PD) programme for learning advisors employed in the self-access centre at Kanda University of International Studies in Japan. The research issue investigated was whether the PD activities of advisors allow them to provide appropriate support to students at the University. The implementation of policies, the people and the setting were all considered in building an understanding of what may make the programme work. The framework used to understand this programme is realist evaluation (Pawson & Tilley, 1997), in which theories related to the initial research issue were refined and developed to offer new perspectives. Results suggest that initial training aids advisors in supporting students, but that future implementation decisions are needed for the mentoring element of the programme and on whether more peer observation should take place. The implication that informal discussion among the workgroup and the freedom to choose personal PD journeys are fundamental drivers of effective practice is a finding that may be applied to other teacher and advisor education settings.