Board Thread:Questions and Answers/@comment-11398218-20130629184317/@comment-5398287-20130810065012

Komamura's Bankai, unlike any other known ones thus far, is tied directly to his body. When one is damaged, the other's body reflects that damage, but when one is healed, the other is as well. Komamura's Bankai and Mayuri's Bankai are the only Bankai which can be returned to normal, the former through bond-based healing and the latter through modifications for when it is damaged.