is one piece episode 767 filler?

As day breaks over Zou, Robin, Franky, and Brook wake up and they realize that they slept through the night. They then see the drawing of Torasaburo right next to Ryunosuke, and realize that Kin'emon and Kanjuro have gotten onto the island.

The trio know that the minks are not going to take well to the samurai mentioning their comrade Raizo, as Jack and the Beasts Pirates destroyed the Mokomo Dukedom while looking for the nonexistent Raizo, and so they race to stop the samurai. Meanwhile, Bariete races up the steps to a bell, and he rings the bell as he calls out the samurai's arrival.