The “Enjoying Summer Learning Program (ESLP) ” is a pilot project of using summer vacation as providing local languages and integrated learning curriculum for elementary and junior high school students which hold by the Ministry of Education, Taiwan. With aims of achieving educational innovative experiments and enhancing students’ learning effectiveness, ESLP is expected as its effects for preventing students’ learning loss. However, some issues like “what position should it take? ” and “how to put into practice?” are also called into questions. To clarify effective ways to cope successfully with this program, this article selects a project of school Saturday activities in Japan as an example that is closely similar to ESLP with its purposes, contends, curriculum frameworks, and types of implementation. Also, with expectations of Japan experience that could contribute to ESLP, this article starts to describe the Japan case from correlated literatures, which are structured by “Saturday lessons”, “Saturday outside-curriculum lessons” and “Saturday learning”. Then to arrange school cases as well as analyzing its tasks they faced in this project secondary. Finally, to conclude, this article discusses with a viewpoint of institutional changes selected to provide recommendations for ESLP.