is one piece episode 910 filler?

Luffy and his friends are rattled after Kin'emon informs them that he and his fellow samurai have traveled across time from Wano, two decades in the past. Kin'emon enlightens them, and begins recounting the history of the kingdom, as well as Momonosuke's father, Kouzuki Oden.

Many years ago, the Flower Capital was ruled by Kouzuki Sukiyaki. Oden was an unruly ronin, who was banished from the city for his violent inclinations.

Free to roam wherever he chose, Oden happened upon at the lawless region of Wano, a valley notorious for its brutality and desecration day in and day out.