One Piece · Episode 421
The Friends' Whereabouts! A Princess Negativity and the King of Demons!
Aired Sunday, October 11, 2009 · 24 min
Mixed canon and filler. Partly adapted from the source; worth watching if you're unsure.
Source: AnimeFillerList, 28 Oct 2026. Full filler list
Synopsis
No synopsis has been added for this episode yet.
Where to watch
One Piece episode 421 FAQ
When does One Piece episode 421 come out?
One Piece episode 421 aired on Sunday, October 11, 2009.
What time does One Piece episode 421 release?
Kitsu has the date but not a broadcast time for this episode. Japanese TV anime typically air in the evening or late night JST.
Where can I watch One Piece episode 421?
One Piece streams on Crunchyroll, Hulu. Availability depends on your region.