If you follow the One Piece Trading Card Game competitive scene, you already know that not all promotional cards are created equal. Some promos ship inside booster packs. Others are handed to players at local game stores. And then there are Treasure Cup cards — a category entirely in their own league.

One Piece TCG Treasure Cups are large-scale competitive events organized by Bandai as part of their official structured play program. Since the game's global launch in 2022, Treasure Cups have become the backbone of organized One Piece TCG competition. They are held multiple times per year across all major regions — North America, Europe, Latin America, and Asia-Pacific — and regularly attract hundreds of players per venue.

For competitive players, they represent one of the highest-tier tournament formats available below a World Championship. For collectors, they are something else entirely: a pipeline for some of the rarest, most desirable promotional cards in the entire game.

This guide covers everything: how the tournament is structured, how players register, what prizes are awarded at each placement tier, and why Treasure Cup promotional cards have become blue-chip collectibles commanding prices from several hundred to over twenty thousand euros.