This research looked at physical education classes in junior high school with the aim of determining potential for gaining tactical knowledge. To achieve this, the research was divided into the following three subordinate questions. Firstly, the research involved examining whether the degree of tactical understanding improves throughout a course of physical education classes. Secondly, the research looked at whether the degree of tactical understanding is impacted by a student's experience of invasion games. Finally, consideration was given to whether there are any situations that create variations in the degree of tactical understanding. The