is one piece episode 401 filler?

In Grove 27, pirates are trying their best to distance themselves from Kizaru whom we're finally introduced to properly. One pirate tries to shoot the admiral but the shot does not even affect him as it phases through the admiral.

Kizaru then appears in front of them trying to ask them where he can find someone named Sentomaru but the pirates run away in fear. Kizaru then attacks them with light coming from his foot, which he kicks outwards.

This not only passes in between the pirates, it also topples a mangrove in the process much to the disapproval of his troops.