Yakuza 4's latest trailer introduces us to the playable characters of Sega's Yakuza. Meet Shun Akiyama, the business man, Taiga Saejima, the muscle, Masayoshi Tanimura, the good cop gone bad, and Kazuma Kiryu, the dragon of Dojima. Yakuza 4 is rated M fore Mature and the ESRB lists a myriad of reasons why. This trailer focuses on the "blood" and "violence" aspects. Yakuza 4 will be released exclusively on the PS3. An official release date has not been announced but is expected sometime this spring.