it's the design of the game, it doesn't even take 1-2s to load them so they can be streamed obviously, but they have to keep it monster hunter, so you basically get bigger areas with multiple zones instead of the old smaller areas and smaller zones. you'd understand if you play the game and understand the game mechanics of it. basically the entire map info is loaded before the mission starts, so loading time is very short inbetween zones, you can literally see the monsters you paint moving about in other zones, or eating other weaker monsters(or other things) for stamina when it gets tired and runs or flies away. it's only that way because of the monster zoning mechanics of this game.

You find a solution yet? If not, then pm me. I do not want to promote piracy, but I do know how you can get it working, and can provide links. If you like the game hopefully you buy the U.S release. I actually imported the game(still didn't get it yet) and will be selling it to one of my friends once I am done with it, then will be buying the U.S release. That is the solution I came up with so I don't waste too much money.