Luffy gets knocked out by Kaido in One Piece episode 1070. That’s the episode where the fight’s momentum swings hard and Luffy is shown unconscious after Kaido’s attack.

Episode context

  • Their first big clash happens much earlier in episodes 913–915, but that is not the knockout people usually mean.
  • The knockout tied to the Onigashima battle is the one in episode 1070.
  • The broader Luffy vs. Kaido finale continues after that, leading into the later Gear 5 showdown.

Quick note

If you were asking about the episode where Kaido first one-shots Luffy , that’s a different early Wano moment, not the later knockout during the final battle.