is one piece episode 753 filler?

The Straw Hats, Law, and the samurai Kin'emon and Kanjuro ride Kanjuro's dragon up the hind leg of a large elephant in order to reach the island of Zou on its back. However, the dragon quickly grows tired and struggles to keep ahold of the elephant's leg, and it slides back down to the Thousand Sunny.

The Straw Hats encourage it, with Usopp dubbing it "Ryunosuke", and it continues climbing despite its progress being lost.