one of the first reasons i want to hit up the Japanese iTunes store is for Kahimi Karie:
this selection is definitely not available in the US. Not to mention, $1USD=¥112.
Just like all the other countries i've tried shopping from, I can't seem to find a way to grab an iTunes GC to buy anything. When i actually get ready to front up the 22 bucks, i'll find some pen pals.