- Name: Auto-Slash
- Martial Art Style: Kenjutsu (Iaido)
- User: Kagero Sai
- First Use: Battle 286
One of Sai's basic attacks. Using his sharp instincts and reflexes, he draws and resheaths his sword so fast that everyone and everything within 3 meters of him gets cut down. Sai has mastered this technique to the point that he sometimes does it unintentionally to the people around him, as shown in his first apperance in battle 286. After the loss of Setsunamaru, Sai was given a gardening hoe by Shigure, and Sai has been shown adapting his new weapon with this technique, to the point where he can use this technique with the hoe almost as good as he would have with Setsunamaru.