In sports, martial arts and other interpersonal sport games, skilled players often predict the next move and other actions based on the actions of their opponents. In badminton, players predict the return of a shuttlecock based on information, such as opponent location, the impact point or the racket surface direction. The more experienced a player plays badminton, the more intuitive he or she becomes in predicting the return strokes. In addition, the rally speed of badminton has been increasing year by year in recent years due to improvements in athletic ability resulting from experience, improvements in the performance of rackets and shoes, and physical modification through efficient science-based practice. Badminton has become the fastest ball game in the world.

Haniwa were created for ritual use during the Kofun period and were buried with the dead as funerary offerings. Archaeologists visually observe haniwa and classify them based on archaeological findings, such as the characteristics they possess. Since observation is a subjective evaluation, an objective evaluation method is necessary for authenticity. For objective evaluation, Lu .et al.¹ presented a previous research by using 3D point clouds of Haniwa. Unfortunately, Lu .et al.¹ includes manual operation to extract target point sets.