is one piece episode 921 filler?

Komurasaki the parades through the streets of the Flower Capital, stunning the spectators with her beauty. In Udon, Luffy continues to break rocks but is approached by Caribou, who begs him for food.

Previously, Caribou met Luffy in the Sabaody Archipelago and terrorized Fish-Man Island, but was defeated by Luffy. He would later continue his crimes in the New World until being captured by X Drake, and was sent to Udon for hard labour.

Meanwhile, Kyoshiro's henchmen who were defeated by Sanji report to their leader.