The Cursed Warrior

is episode 162 of the original Naruto anime.

Synopsis
Naruto, Neji, and Tenten are sent by Tsunade to the Land of Birds to investigate reports of a ghost, Cursed Warrior, terrorizing the local population. Upon arriving, they learn that the daimyō has died, and that his son, the successor, cares little about his duties due to the recent death of his sister. Later that evening, the Konoha ninja encounter Cursed Warrior and give chase. After cornering it, however, an examination by Neji's Byakugan makes the group realise that the armour the Cursed Warrior is wearing is empty.