Kaiji is a Japanese anime series based on the manga by Nobuyuki Fukumoto. It follows the story of Kaiji Itou, a down-and-out gambler who is thrust into a world of high-stakes gambling to clear his debts. The series is known for its intense psychological battles and the protagonist's struggle against overwhelming odds. It delves into themes of desperation, human nature, and survival. The gripping narrative and unique art style have made it a standout in the psychological thriller genre.