Bankai is a powerful technique in the anime and manga series Bleach, created by Tite Kubo. It is the final and most advanced form of a Shinigami's Zanpakutō, which is a sword that embodies their spirit. To achieve Bankai, a Shinigami must master their Zanpakutō and undergo a rigorous training process, often requiring a deep bond with their sword's spirit. When activated, Bankai significantly enhances the Shinigami's abilities, granting them unique powers and often altering the appearance of their Zanpakutō. Each Bankai is distinct, reflecting the individual Shinigami's personality and fighting style, making it a crucial aspect of battles in the Bleach universe.