is one piece episode 855 filler?

Katakuri prepares to use Mochi Tsuki on Luffy in the air, but Luffy manages to use the wall to propel himself away from Mogura. Luffy attempts to counterattack, but Katakuri throws him into the wall and strikes at him with Mogura again.

Luffy very narrowly avoids being impaled, and when Katakuri attempts another strike, he bunches himself up to duck under it. However, this propels him upward right into the ceiling, and Katakuri kicks him back to a wall.

Luffy narrowly falls to the ground right before Katakuri strikes his spot on the wall with Mochi Tsuki, and he is utterly dazed.