Well...this is how I see it.
Final Fantasy = Japanese Dungeons & Dragons
Yakuza = Japanese Grand Theft Auto
The cultural differences can be seen in gameplay elements.
JRPG's play drastically different from WRPG's.
This Genre I guess we can call Crime Sandbox??? idk lol. But yeah GTA is Western Crime Sandbox & Yakuza is Japanese Crime Sandbox...would that fit better?
Even though there's no Grand Theft Auto taking place in the game it's very similar to the series as far as being a freeroam game centered around criminal activity.
GT: Ningenmaru, PSN: Nuninga