is one piece episode 623 filler?

Luffy, the crew, and the children are all having fun while Law and Smoker talk. Law thinks back to when their alliance was formed, and they agreed to target Kaidou of the Four Emperors first.

When Luffy says he plans to defeat all of the Four Emperors, Law tells him not to take them lightly, and that the chances of their plan to defeat Kaidou succeeding are slim. After the feast the Straw Hats are about to set sail and leave.

While they are seeing the children off, the G-5 Marines start insulting them and they put up a barricade so the children cannot see them.