is one piece episode 377 filler?

After the devastating power of Kuma's Ursus Shock, everyone of the Straw Hat Pirates and the Rolling Pirates are knocked out. Kuma then takes this time to try and capture Luffy who is still worn out from his fight with Moria earlier.

However, just as Kuma picks up Luffy, he is suddenly attacked by Zoro who slashes at him with Ittoryu Iai: Shishi Sonson. This attack manages to damage Kuma but Zoro is shocked to see cybernetic parts under Kuma.