is one piece episode 572 filler?

At the palace, the rest of the crew (except Franky) are having tea with the Minister of the Right who states his gratitude towards the crew for saving the island and that they don't need to be so modest about themselves as he's glad to serve them tea. As Usopp states how they are ready to leave the island, Shirahoshi starts crying not wanting them to leave stating she doesn't want to hear that and calls him "nose-sama" and Usopp corrects her and tries to apologize.