Yin Seal: Release

After focusing and storing an amount of chakra over a period of time in the White Strength Seal on the user's forehead, the user releases the seal, thus temporarily filling her reserves at 100% while pumping the chakra continuously back to her body. Because of this, Tsunade is able to use unique techniques that require more chakra than a normal shinobi's body can hold. Firstly shown, she has used this stored chakra to perform the Creation Rebirth technique on herself and later on a separate occasion healed a vast amount of people through Katsuyu. During the Fourth Shinobi World War, Tsunade is also able to use the Strength of a Hundred Technique after releasing the seal.

Trivia

 * After using the chakra from the White Strength Seal for her techniques, if there is any leftover chakra, Tsunade may use it to re-form the seal as she did after her fight with Orochimaru.
 * Strength of a Hundred Technique requires a variation of the release of this seal. The released seal wraps around the user's body supplying chakra to the parts the body instantly, either for regenerating or for separate techniques.