Really? In the States I can get Gig of RAM for my system for about $20 and a Gig for my older system for about $50.
If you are looking to get a new computer, I recommend going to a store and checking systems out and then buying the same thing online once you know what you want. Sellers like Tigre Direct and NewEgg are reliable and high quality and can deliver at about half the price of a traditional bricka nd mortar store.
Of course, I don't know what the extra costs are like for shipping into Japan, and you would have to add the OS after you got it...
Oh well, maybe I'm not such a big help.
