Ryu ga Gotoku, known internationally as the Yakuza series, is a popular action-adventure franchise developed and published by Sega. It follows the story of Kazuma Kiryu, a former yakuza, as he navigates the criminal underworld of Japan. The series is praised for its engaging storytelling, vibrant open-world environments, and a blend of intense combat and quirky side activities. It offers a unique insight into Japanese culture and the intricacies of yakuza life.