is one piece episode 546 filler?

Decken hears about the Tamatebako and tells his men to get it for him and when they cannot, he decides to wait a few years until Shirahoshi is older. Otohime returns and explains that the World Nobles have a lot of influence on the world and returned with a signature by them and all the citizens finally give her their signatures for her cause.

She celebrates with her children and husband. At the palace, Otohime explains to her sons about the Sea King incident and how Shirahoshi was the one who summoned them.