The nine finger "cuts" that give the Ninja their power. Although believed to be a Ninja secret the Kuji-In was also used by some Buddhist priests of the time. Where it came from no one is sure but it does have similarities to Hindu and Tibetan Mudras. The Kuji-In is more a way of concentrating the mind than weaving magic with one's hands despite many Sensei and Movie companies' attempts to depict otherwise. Related to kuji-kiri.