Funeral March for the Living

is episode 152 of the original Naruto anime.

Synopsis
When Naruto saves three guys, he is dragged into yet another mission. However, unlike the last two this is one he does not wish to partake in. However, when Guy reveals information that the leader of the Kurosuki Family, Raiga, is connected with the Seven Swordsman of the Mist, Naruto decides to change his mind, since Zabuza Momochi and Kisame Hoshigaki of Akatsuki were each a part of the group. Lee concludes that as Kisame is Itachi's partner, finding Itachi may bring them closer to Sasuke. With Neji, Lee, and Tenten as his allies, the group goes on their new mission.