is one piece episode 904 filler?

After defeating the yokozuna Urashima, Luffy demands to see the boss of Bakura Town to rescue Tama. The crowd sees them as rebels and begin attacking them.

Luffy and Zoro fight off the crowd, and Kiku also joins in armed with a katana. Luffy learns that the boss of the town was Holed'em, but mishears his name as "Ball-de-boo." Meanwhile, the children of the poverty-stricken Okobore Town continue to face hunger.

Tsuru needs to treat another child who drank the polluted river water out of hunger. Some labourers from this town work at Bakura Town, where food and clean water are plentiful.