The One Piece Card Game OP-03 "Pillars of Strength" Japanese booster box is a 2023 release containing 24 packs, with each pack having 6 cards, for a total of 144 cards per box. This set focuses on strong enemy characters from the East Blue, Water 7, and WCI arcs, introducing new "yellow" color cards and cards that enhance pre-existing decks, according to Target and TCGplayer. It has a total of 127 card types, including 8 leader cards, and a variety of rarities, with the potential for alternate art and parallel design cards, notes TCGplayer. 
Contents and structure
Total cards: 127 types
Box contents: 24 booster packs
Pack contents: 6 cards per pack
Rarity breakdown:
Leader Card: 8
Common: 45
Uncommon: 32
Rare: 26
Super Rare: 10
Secret Rare: 2
Special Card: 4
Other inclusions: The set also includes alternative art and parallel design cards within these rarity types, as well as a "Box Topper" card. 
Set theme and features
Theme: The third booster set, themed on "Pillars of Strength," features strong enemy characters and allies from the East Blue, Water 7, and WCI arcs.
New color: Introduces new "yellow" color cards that enhance the "Big Mom Pirates" Start Deck.
New leaders: Includes new leaders like "Ace" and "Nami," expanding strategic possibilities.
Alt-art: Features a new style of alternate art cards with a "WANTED" design.
Packaging: Unlike English boxes, Japanese boxes are sealed with tape over the top flap instead of shrink wrap