You should listen to Aoi sora aoi umi. It's one of the best japanese songs that I've ever heard.
EDIT: GOD that was hard to find. Anyway, here it is (this is so off the topic, I'll stop talking about her, but I just want to share this)
http://www.youtube.com/watch?v=pLVMP075Syk
Makes me cry a little, even now.