Is Naruto Shippuden episode 321 filler?
Naruto Shippuden episode 321 is canon — it adapts the original story.
Episode: 321 — Reinforcements Arrive
Classification: Canon
Air date: Jul 18, 2013
Naruto Shippuden episode 321 is canon — it adapts the original story.
Episode: 321 — Reinforcements Arrive
Classification: Canon
Air date: Jul 18, 2013