"Yakuza (龍が如く Ryū ga Gotoku, lit. "Like a Dragon") is an action-adventure video game franchise created by Amusement Vision and owned and published by Sega.
The series has sold at least 3.2 million copies as of March 2009. Strong sales of the games in its original Japanese market has led to the franchise's expansion to other mediums, including film adaptations."
Source: Wikipedia, "Yakuza_(series)", available under the CC-BY-SA License.