Rakuten Ichiban

Techcrunch have an article about Rakuten.
http://www.techcrunch.com/2009/07/05/japans-rakuten-can-the-biggest-e-commerce-site-you-never-heard-of-become-a-threat-for-amazon-globally/
It’s mostly e-business guff, but there is a small section which is relevant to buying goods from Japan.

... About a fourth of all items available for Japanese customers can be ordered from selected countries through a service called Rakuten International Shipping Services . Non-Japanese users can access Google-translated item pages (24 languages are currently supported), place an order, pay via credit card and then wait for direct delivery from Japan (it’s even possible for foreigners to collect Super Points ).

I’ve never ordered from Rakuten, but it looks like you can search for products from this page:
http://event.rakuten.co.jp/borderless/index_en.html
It looks easy:

http://event.rakuten.co.jp/borderless/infoservice/en/shoppingsteps/

I'll let you know if I make a purchase. Let me know if you have any success too.