I've been making a lot of orders on amazon.co.jp recently, and one of the odd things I noticed was that I wasn't being charged shipping even for orders under 1500 yen.
It turns out that amazon has a "free shipping" campaign for books, CDs, DVDs, video games and computer software, lasting until November 4th.
So if there's anything you desperately want but can't think of anything else to buy with it, here's your chance!