Well, this is an improvement over Yakuza 3’s DLC. You get this pack for free. It raises the limits of your character’s strength and stamina, and also picks up your relationship with Haruka to a higher point. Oh, and two new karaoke songs.
There are also four new themes (not so free, except to PS+ users), each highlighting a different character of the game. They include Kazuma, Akiyama, Tanimura and Saejima. For normal PSN members, these will run you $2.99 each (£1.99, €2.49).
Pictured below is Akiyama’s theme. The rest of them are pictured at the SEGA Europe’s Blog, linked below.