is one piece episode 768 filler?

Somewhere at sea, the fleet of the Beasts Pirates is sailing. Inside the damaged but still functional Mammoth, a recovering Jack sits belowdeck and reads the newspaper article about his supposed death.

Mocking such a thought, Jack shreds the newspaper and orders his men to make the ship move faster. In order to verify his claim of being a retainer of the Kouzuki Family, Kin'emon removes his kimono, revealing the crest of the family on his back.

Behind him, the Straw Hats ponder in shock about this sudden turn of events, but understand why the samurai kept their allegiance a secret from them.