If you've never checked out a Yakuza title before, don't be afraid to jump in with part four. There's a nice feature at the onset of the game that'll allow you to catch up plot wise, but even without that, I don't feel like you'd be too lost on what's going on. And for the long time fans that felt their interest going by the wayside after Yakuza 3, I urge you to check out Yakuza 4, as I think you'll find yourself falling in love with the series all over again.
Sweet. Works out to a 91/100.