This study examined the characteristics of groups that suppress anthropophobic tendencies based on high school club activities. First, assuming “parental nurturing attitude,” “chamship experience,” and “social skills” as factors regulating anthropophobic tendency, multiple regression analysis was conducted with these as explanatory variables and anthropophobic tendency as the objective variable. These results suggest that “relationship initiation, relationship maintenance,” and “assertiveness skills” significantly suppress anthropophobic tendencies. Next, in order to understand the group characteristics that enhance “relationship initiation skills,” “relationship maintenance skills,” and “assertiveness skills,” which are thought to suppress anthropophobic tendency, multiple regression analysis was conducted with club activity characteristics as the explanatory variable and social skills as the objective variable. The results showed that “forced club membership” was associated with “relationship initiation skills” and “club advisor’s performance-based approach” and “number of people at the competitions and presentations” with “assertiveness skills”. Therefore, it is conceivable that forming a group with these characteristics can suppress anthropophobic tendencies.