The UNION ARENA Booster case contains 16 boxes of collectible cards featuring the popular game UNION ARINA. Manufactured by Bandai, these Japanese-language cards are designed for ages 9 and up. Each booster case includes standard-sized cards made of paper, offering collectors the opportunity to enhance their card collection and compete in the exciting world of UNION ARINA. These cases are perfect for fans looking to expand their collection with fresh cards from Japan.