One Thousand Years of Death

Overview
One Thousand Years of Death (Or One Thousand Years of Pain) is a secret finger Taijutsu technique used by Kagami Uchiha. This jutsu is one of the very few erotic jutsu, overshined by the Ara Ara Genjutsu technique. The user tightly clasps their hands together and extends their middle and index fingers, resembling the Tiger hand seal. Using the full weight of their body, the user thrusts these four fingers between the target's buttocks, penetrating the anus. Despite the technique's dramatic name, it is not actually harmful. The pain is fairly extreme, however, so much so that, when Kagami Uchiha uses it on Kenzie Uchiha, Kenzie comically leaps into the air, travelling a fair distance. Jett Uchiha blushes to see it used and Kenji Nara declares both Kagami and Kenzie "buffoons". The anime shows those who are familiar with One Thousand Years of Death are very unwilling to be subjected to it. It has no effect on unconscious targets.

Kagami later uses this technique against Genesis Uzumaki. It seemed to have taken effect on Genesis for a bit but Genesis later responded with a backhand slap on Kagami.