The One Piece OP-07 "500 Years in the Future" Japanese booster box contains 24 packs, with each pack holding 6 cards, totaling 125+1 possible card types. The set focuses on characters from the "500 Years in the Future" storyline, including Bonney, Hancock, and new leader cards like Monkey D. Dragon. Japanese versions often have a higher chance of pulling rare cards, such as a Secret Rare per box, and typically use a tape seal on the top flap instead of shrink wrap. 
Booster box contents
Booster Box: 1 box contains 24 packs.
Booster Pack: 1 pack contains 6 cards.
Total Cards: 144 cards per box.
Card Types: Over 125 types of cards, including Commons, Uncommons, Rares, Super Rares, Secret Rares, Specials, DON!! cards, and Leader cards. 
Key features
Focus: Features characters and storylines from the "500 Years in the Future" arc.
Characters: Includes cards for characters such as Bonney, Hancock, and Monkey D. Dragon.
Gameplay: Introduces six new Leader cards to add strategic variety.
Authenticity: The Japanese version of the booster box is sold directly by Bandai. 
What to know about Japanese boxes
Seal: Unlike many English boxes, Japanese booster boxes are sealed with a piece of tape across the top flap instead of shrink wrap.
Rarity: Japanese versions are known to have a higher probability of pulling rare cards, with a typical box often containing at least one Secret Rare.
Card pool: The set is designed to be compatible with previous One Piece Card Game releases.