Yin Seal: Release

Yin Seal: Release is a powerful sealing technique used by Tsunade. Over a period of time, Tsunade will focus and build up chakra in the seal mark on her forehead. The release command will disperse the seal and allow the stored chakra to pump back into her body. She uses the chakra to perform Creation Rebirth on herself or to heal a vast amount of people through Katsuyu.

Trivia

 * After using the chakra from the Yin seal for her jutsu, if there is chakra left Tsunade may use it to re-form the seal as she did after her fight with Orochimaru.
 * Tsunade's grandmother, Mito Uzumaki, had the same diamond-shaped mark on her forehead. Although it is believed that Tsunade's seal was modeled after the mark, whether or not her grandmother could use the same technique is unknown.