is one piece episode 402 filler?

Kuma's beam is fired upon the Straw Hats while Monkey D. Luffy dodges.

Usopp, Franky, and Brook are in shock that Kuma shoots from his hands. He fires another laser and nearly hits the three, forcing them to hide.

Luffy, Roronoa Zoro, and Sanji charge at Kuma and they combine their attacks, knocking down Kuma. Luffy begins to realize Kuma looks different.

Zoro knows that Kuma would have dodged their attacks and that the Kuma they are fighting is actually a fake. "Kuma" rises again. Meanwhile, Urouge tries a Retribution punch on the "Kuma" he is facing and seems to have an effect.