is one piece episode 453 filler?

As Luffy's ship heads to the Marine Headquarters, the scene shifts to a point some time in the past. Nami is still on Weatheria.

She asks the old man how many days are left till they reach the Sabaody Archipelago, to which he replies that the island is slowly heading towards the Sabaody Archipelago at a pace determined by the winds. The old man agrees to give her a ride to the blue sea, as he also needs money so he can make 'business'.

He finds an island that is completely dry and dying, and tells the residents he will make it rain if they pay him 100,000,000.