In Haikyuu!!, the concept of facing one's fears is addressed through the characters' development and growth throughout the series. The main characters, such as Hinata and Kageyama, often face challenges and fears on the volleyball court and in their personal lives. Through hard work, determination, and support from their teammates, they learn to confront their fears, overcome obstacles, and grow both as individuals and as athletes. The show emphasizes the importance of facing fears head-on, pushing past limitations, and believing in oneself to achieve success.