Ep. 351: Kakashi investigates Hashirama's cells and uncovers Kinoe's secret while Hiruzen faces an assassination plot.
Aired on February 20, 2014Filler

351
Haunted by nightmares of Rin, Kakashi infiltrates the archives to investigate Kinoe’s Wood Style abilities. He discovers a secret note regarding Hashirama Senju before Hiruzen arrives. Hiruzen explains that Kinoe survived an experiment where Leaf ninjas were injected with Hashirama’s cells to harness the First Hokage’s power. The following day, Hiruzen is ambushed by Root operatives led by Kinoe, acting on Danzo’s orders to assassinate the Third Hokage. The target is revealed to be Kakashi in disguise, allowing the real Hiruzen to confront Danzo. After Hiruzen is reappointed as Third Hokage, Danzo tells Orochimaru to cease their meetings, believing Kakashi has betrayed him.
Episodes
- Ep. 347 · Akatsuki faces Hidden Stone deception while Jiraiya praises students' progress in Rain Village.
- Ep. 348 · Nagato assumes leadership of the Akatsuki after Yahiko's death and the destruction of enemy forces.
- Ep. 349 · Kakashi struggles with trauma after Rin's death while Minato becomes Hokage and Kakashi joins ANBU
- Ep. 350 · Kakashi guards Kushina during childbirth while Obito releases the Nine-Tails, leading to Minato's death.
- Ep. 351 · Kakashi investigates Hashirama's cells and uncovers Kinoe's secret while Hiruzen faces an assassination plot.
- Ep. 352 · Orochimaru flees after escaping Hiruzen and defeats Kakashi before being injured by a snake bomb.
- Ep. 353 · Kakashi encounters the Iburi clan and their leader Kinoe, who uses Wood Style to bind him for interrogation regarding Orochimaru.
- Ep. 354 · Kakashi and Kinoe confront Orochimaru while Yukimi chooses her clan's fate
- Ep. 355 · Danzo sends agents to steal Kakashi's failing Sharingan while he investigates Orochimaru's hideout