No, this is not GTA meets Japanese organized crime. Far from it indeed.
The story is somewhat off-center. It isn't a "crime drama" as one would expect. However, the story does answer some puzzling questions that are brought up during the main story line. Another headache about this game is that the in-game map is very small. You essentially run around a fictitious city in Tokyo. You can use a cab to move from one part of the map to another, but it still doesn't feel like a fully living and breathing world. It comes off very sterile and artificial. So, hopefully the sequel (yes, there is a sequel) will improve upon this tidbit. The game features adequate voice acting from celebrities like Michael Madsen, Eliza Dushku, Michael Rosenbaum, etc. What would've really been good was if Sega added a Japanese soundtrack with English subtitles. It would've added to the authenticity. You can't expect for everyone in a suburb of Tokyo to speak perfect English. Finally on a more off-color note, this game has more cursing in it than The Getaway. Almost every other word is a profane, four-letter utterance. Cursing does not add to the "organized crime" feeling. Since the cursing is so prominent in this game, it actually becomes funny, then swiftly transitions to annoying. Graphics wise, this game won't win or lose any beauty contests. As far as sound is concerned, do yourself a favor and pop in your favorite CD into your stereo, because the music in this game is lackluster at best. If you're into beat-em up games, then Yakuza may be for you. If you're expecting a Grand Theft Auto Japan, leave this game alone.