Creation Rebirth

Over time, Tsunade concentrates her chakra to a spot on her forehead that takes the form of a diamond. When she releases the seal, the chakra disperses and stimulates the proteins of her body to increase the speed of cell division and reconstruction of cells for as long as she has enough chakra. This allows her to recreate all organs and tissues. The technique itself does not regenerate the old cells, rather it hastens the creation of new ones through division. Unfortunately, a body's cells can only split a certain number of times in a lifetime, and by speeding up this process, Tsunade is shortening her natural lifespan. To what degree is unknown, but what is clear is that it is not great enough to cause her to die in battle.