The One Piece Card Game OP-12 Japanese booster box is called "Legacy of The Master" and focuses on the bonds between master and disciple characters. Each box contains 24 packs, with 6 cards per pack, and includes new Leader cards and a variety of rarities like Super Rare and Secret Rare. This set is designed for both players looking to strengthen decks and fans who enjoy collecting the illustrated cards from the series. 
Box and pack details
Name: OP-12 "Legacy of The Master"
Box Contents: 24 booster packs per box
Pack Contents: 6 cards per pack
Total Cards: 144 cards per box
Language: Japanese
Release Date: May 31, 2025
Sealing: Japanese boxes are sealed with tape on the top flap, not shrink wrap. 
Set features
Theme: Focuses on the master-disciple relationships between characters, such as Sanji and Zeff.
New Leaders: Includes 6 new Leader cards with new effects that can strengthen a wide range of existing decks.
Card Rarities: Contains Commons, Uncommons, Rares, Super Rares, Secret Rares, SPR cards, a Treasure Rare, and a DON!! card.
Artwork: Features illustrations of characters and events from the series.