The purpose of our study was (1) to clarify the elements and mechanisms of loss of spirit (LOS), and the ways to prevent LOS during competition, and (2) to identify the factors that prevent LOS. We interviewed 18 athletes and analyzed their interview transcripts by creating tags and categories. We divided the text of each transcript into text segments (tags) containing information about LOS or ways to prevent LOS. We then gathered tags with similar meanings and labeled the cluster of tags (categories) to briefly indicate the topic (Côté et al., 1993). Results revealed that the phenomenon of LOS had the following three phases: (1) cause of LOS (e.g., game situations, negative emotions), (2) condition of LOS (e.g., poor concentration, losing the will to fight, negative game situations), and (3) response after the game (e.g., undesirable result). The phenomenon of preventing LOS had the following five phases: (1) cause of nearly experiencing LOS (e.g., game situations, negative emotions), (2) condition of nearly experiencing LOS (e.g., decrease of concentration, losing the will to fight), (3) opportunity to prevent LOS (e.g., positive words and actions of others, heightening the fight), (4) condition after preventing LOS (e.g., improvement of performance, emergence of positive emotions), and (5) response after the game (e.g., evaluation of the game). Furthermore, a comparison of these phenomena revealed that LOS may be prevented by high levels of motivation before the game, positive words and actions of others, keeping the fight, reframing one's thoughts, improving the game situations, and preserving stamina.