Naruto's School of Revenge

is episode 181 of the Naruto: Shippūden anime.

Synopsis
During the construction of Konoha, Naruto, Sakura, Inari, and Tazuna are sitting together and remembering the days of the original Team 7. The team was on a mission of having to return Mr. Ostrich to his habitat. Mr. Ostrich was very fond of pecking Naruto and Sasuke onto their heads. When travelling through what it seemed like a small city they encountered a vendetta where the challenger was fighting for the revenge of the deceased family member. The participants in the fight were Tsukado, who was the current challenger, and Kageki. At first look, Tsukado looked like an amateur fighter, always inferior to his opponent. Naruto said that he will teach Tsukado how to gain victory in his fight, but the training was not successful. After Mr. Ostrich went wild, Tsukado revealed his sword skills, explaining that he cannot win because he cannot look straight into Kageki's eyes. Meanwhile Kanabun and his gang organised the fight once more. Tsukado thought he could win by not looking into opponents eyes but he did not succeed. Naruto, seeing something is not right interrupted the fight and discovered that Kageki is not the man Tsukado's looking for, explaining that [Katazu]] took the role of his brother because he believed that the murder was an accident. Tsukado believed in this story and he cancelled his vendetta. But, the gang did not like this ending because they placed bets. Team 7, Tsukado, Katazu, and Mr. Ostrich managed to gain victory after chasing the gang out of town.

de:Episode: Das missglückte Duell