Well, the X360 games are with the same prices as the one you see in the U.S., i believe it is cause they are imported from MS itself.
Nintendo here has hired another company and charges more so the games are about U$70 or even U$100 (Mario Kart With Weel, SSBBrawl).
Sony has a Sony Style store and their stuff, but they are soooooo expensive ! i can save about U$100 on a 32" FullHD Bravia TV just walking to the next store (in the same mall !).
Hey, we here are not rich, but they even charge us a lot more than in japan itself X_X