Haikyuu!! has played a significant role in increasing the global popularity of volleyball by showcasing the excitement, teamwork, and intensity of the sport through its engaging storyline and well-developed characters. The anime has introduced many viewers to the rules, strategies, and dynamics of volleyball, sparking interest in the sport and inspiring fans to learn more about it. Additionally, the diverse and relatable characters in Haikyuu!! have helped to attract a wide audience worldwide, further contributing to the growing popularity of volleyball on a global scale.