Naruto Episode 173 -

The episode details the betrayal by Hanzo of the Salamander and Danzo Shimura , which led to Yahiko's self-sacrifice. This "second great pain" transformed Nagato into Pain, leading him to believe true peace can only be achieved through shared suffering.

There are two episodes titled within the Naruto franchise, belonging to the original series and the Shippuden sequel. Naruto Shippuden Episode 173: "Origin of Pain"

In the Boruto sequel series, this episode occurs during the "Kara Actuation" arc. Naruto Episode 173

They discover a God Tree sapling being grown illegally, which Victor plans to use as a source of power by feeding it humans.

The story follows Nagato, Yahiko, and Konan as they survive the war-torn Amegakure and eventually meet Jiraiya , who agrees to train them. The episode details the betrayal by Hanzo of

Naruto, with the help of the Nine-Tails' chakra, defeats the scientist Amachi . He then summons Gamabunta to evaporate the massive sea monster, Umibōzu, which is threatening the group.

The episode focuses on Isaribi , a girl who was experimented on. Seeing Naruto fight despite being treated as a monster himself, she finds the hope to go to Konoha for a potential cure from Lady Tsunade. Naruto Shippuden Episode 173: "Origin of Pain" In

During an attack by a renegade ninja, Nagato reflexively uses his Rinnegan to save Yahiko. Seeing this, Jiraiya begins to believe Nagato is the "Child of Prophecy" and the reincarnation of the Sage of Six Paths .