A Weiss Schwarz Oshi no Ko Japanese Booster Box is a sealed box containing 16 booster packs of Japanese-language trading cards from the popular anime series. Each pack has 9 cards, and a full box includes 16 packs, for a total of 144 cards. The cards feature newly illustrated artwork, parallel versions for all normal cards, and are intended for collectors and players of the Weiss Schwarz game. 
Box contents and details
Packs per box: 16
Cards per pack: 9
Total cards per box: 144
Language: Japanese
Characters: Features characters from the Oshi no Ko anime, such as Ai, Aqua, and Ruby
Card features:
All 100 normal cards have a parallel card version
Includes newly drawn illustrations
A chance to pull hot-stamped sign cards from voice actors like Rie Takahashi (as Ai) and Takeo Otsuka (as Aqua)
Compatibility: Cards can be used in decks with other cards from the set, which are identified by the card number prefix "[OSK/]"