The Japanese Hardcore buy all three if they can afford or see value in it just like us. When it comes to games they usually lead the trends, new-genre brain games is where they are buying. We may think it is the casual audience that is buying every Brain Age/Cooking/Darts/etc game but too many are selling, casual gamers don't have the same attach rate hardcore gamers have.
I would cite regulation, but I know you will simply ignore it.