Yeah it's pretty strange, Yakuza 3, Yakuza 4 and now another title in the Yakuza series all within a week, bizarre times.
But if you read up on what it says about the "boy" which isn't really a boy but a young man, it sounds nothing like Kazuma and then why showcase the game with artwork instead of showing us the same assets you've been using for two (And presuming this one, a third) games? I realize they want to hype people up, but the way they are going about this is rather odd...