Notice 12/2015: I have not purchased from Tokyo Fashion since this was originally written and do not intend to do so in the future. Their website has since changed and I am unfamiliar with current procedures. As such, I am unable to answer email inquiries regarding the ordering process. This post will be left up only as a reference in case it is helpful.
Since I wrote my original tutorial on ordering from Tokyo Fashion, their signup and payment processes have changed. I think they're a bit more straightforward now.
Tokyo Fashion (東京著衣) is a popular Taiwanese brand founded by Mayuki Zhou in 2005. Along with its sister brands Mayuki and YOCO, Tokyo Fashion is one of the top Taiwanese webstores, and they have consistently good quality. Their styles often get copied by Chinese wholesalers, unfortunately, but if you want the real thing you can buy directly from them - they ship internationally, and the price works out to about the same as a wholesale site anyway.
You have to sign up with their system to order, but then you actually order by email. Even though they do have instructions on their site, only the general instructions are in English, and I thought that non-Chinese-speakers might have some difficulty navigating, so I made a quick guide.
Part I: Signing Up
Part II: Shopping
Part III: Placing an Order
Warning: image heavy! Click on the images to expand.