Yakuza 4 is an action-adventure video game developed and published by Sega for the PlayStation 3. It is the fourth main entry in the Like a Dragon series. The game was formally announced on July 24, 2009. A promotional video was presented at the 2009 Tokyo Game Show. The sequel to Yakuza 3, it was released on March 18, 2010 in Japan, after a playable demo was released on the Japanese PlayStation Store on March 5. Yakuza 4 was released in Europe and North America in March 2011. A sequel, Yakuza 5, was released in 2012.

Yakuza, known in Japan as Ryū ga Gotoku and also known as Like a Dragon in recent series entries to align with its Japanese name, is a video game franchise created, owned and published by Sega. It incorporates elements of the action-adventure, beat 'em up, and role-playing genres.