You really can't mistake a game's country of origin. If it has steroid-pumped meatheads with big guns, it's American. If it looks like Fable, it's British. If it confuses and terrifies the crap out of you in a slightly charming way, you can be sure it's Japanese.
Yes, it's time for more LocoRoco, one of the PSP's most bright and cheerful offerings. LocoRoco 2 looks about as demented as the last one, too. I really do need to make myself pick up the first, though. Anything to give me cause to fire up the PSP for more than ten minutes.