The Death of Naruto

is episode 165 of the original Naruto anime.

Synopsis
Neji, Tenten, and Kakashi stare at a grave. As they head back they throw off a pursuer with a replacement, but are being shadowed by another. Kōmei is about to be forced to commit seppuku, but the Cursed Warrior saves him. Shortly afterwards, it is revealed that Naruto disguised himself as the Cursed Warrior. Kakashi fights Nagare, who uses moves copied from other ninja. Naruto, Neji and Tenten discover that the true identity of the Cursed Warrior is the feudal lord himself, who seeks to kill Mōsō to avenge his father.