Kazuma Kiryu (Japanese: 桐生 一馬, Hepburn: Kiryū Kazuma) is a fictional character and the protagonist of Sega's action-adventure beat'em'up Japanese role-playing game series Yakuza. He is popularly known as "the Dragon of Dojima" (堂島の龍, Dōjima no Ryū) due to the tattoo of a dragon on his back and him originally being a fearsome member of the yakuza group known as the Dojima Family, a subsidiary of the Tojo Clan. He was introduced in the series' debut 2005 game, where he took the blame for his boss's death to protect his best friend Akira Nishikiyama, resulting in his expulsion from the clan and a ten-year stay in prison. After leaving prison, he fights against the new threats in his life, during which he meets Haruka Sawamura, to whom he eventually becomes an adoptive father. He is voiced by Takaya Kuroda in Japanese and by Darryl Kurylo in the English version of the first game which he reprises 15 years later for Yakuza: Like a Dragon. Besides the two Yakuza live-action films, the character has also appeared in other video games including Project X Zone 2 and as downloadable content in the spin-off game, Fist of the North Star: Lost Paradise.
Sega producer Toshihiro Nagoshi created Kiryu alongside Hase Seishū, a novelist who helped write the plotlines of the series' first two games. Nagoshi stated he was created to appeal to a broad audience. Kiryu was the sole playable character for the first three games; in the next three, additional playable characters are included, causing him to take on a smaller role. The series' seventh main installment, Yakuza 6: The Song of Life, is the final game to feature him as a playable character (and he is the only one in the game), and concludes his story arc. While Kiryu still makes an appearance, the eighth main installment stars a new protagonist.
Critical reception to Kiryu has been generally positive. Several critics have praised how Kiryu, despite his history as a yakuza, stood out because of his kindness and character development across the series' story. Kiryu is also often considered a PlayStation mascot. On the other hand, he has also been viewed as a somewhat typical gaming protagonist.