is one piece episode 303 filler?

The episode starts with the narrator announcing the Spring has come, and some excited villagers, including Zoro, discussing the upcoming celebration of blooming of the sakura, which takes place once a year. Meanwhile, Chopper and Luffy are seen with Ninjin lying in bed feeling sick, and Chopper concludes he is too sick to move and better rest; Tamanegi and Piiman are disappointed with it, as they all wanted to visit the Hanami together.