is one piece episode 852 filler?

After sparring with speed, Katakuri predicts that Luffy will attack him with power next as Luffy activates his Elephant Gun. However, his giant fist is met by Katakuri's even bigger mochi fist, and he is slammed into the wall.

Katakuri's men cheer as Luffy falls to the ground, but Luffy quickly recovers and immediately tries attacking again with Grizzly Magnum. However, Katakuri creates two bigger fists just as easily and overwhelms Luffy again.

During their clash, Katakuri transforms the fists back into mochi and covers Luffy's arms with it, allowing him to spin Luffy around.