is one piece episode 804 filler?

Ichiji, Niji, Yonji, and Reijiu continues their training by combat against Germa 66 soliders. A scientist along with Vinsmoke Judge says that they are developing very fast, describing them as real superhumans.

As the Vinsmoke siblings took down the appointed soldiers for training, Judge called them and congratulated them for doing well. Meanwhile, Sanji has been imprisoned by six months.

The cooks there have been wondering since they were making fancy meals every day, but had no idea where it goes to and was reprimanded by an old cook not to be nosy about it.