This is study examines the issues related to improving the expertise of staff members based on their career and nature of employment in the field of day service for children, for effective functioning of day service in the local area. The research targets were 121 staff members of a day service for children in prefecture A, and they were divided into eight groups. Then, factor analysis was applied to 25 items of self-evaluation based on specialty, and eight factors were extracted. Differences between the groups in the self-evaluation of specialty were compared and analyzed. The results demonstrated that three factors did not differ significantly among the groups, while the remaining five factors revealed a significant difference. Based on the results, the staff members were classified into three stages of their careers, "a group of beginners," "a group of present″ and “a group of leaders,” and their issues were established respectively. While for the group of beginners, the content was set according to their common issues and characteristics, characteristics, for the group of present and the group of leaders, it was set according to their common issues and respective employment. The efforts required for quality improvement of expertise were also considered
