Is ONE PIECE episode 1123 filler?
Canon No, episode 1123 of ONE PIECE is canon.
#1123
The World Shakes! The Straw Hats' Hostage Situation
世界震撼! 麦わらの一味立てこもり事件
Aired 5 Apr 2025
Mochibayo compiled this list from MyAnimeList's labels, because MyAnimeList's episode data is not reaching us at the moment.