I found this odd but fun guide to buying used panties in Japan! click the link to go read the full article
http://www.japanprobe.com/?p=18
Japan is a wonderful place. Why? Well, it’s obviously because Japanese guys can buy used, dirty women’s underwear with relative ease. After visiting several of Tokyo’s shops dealing in used panties I have decided to post this guide. If you read this guide, you too will be able to enjoy the national pastime of Japanese men: sniffing used panties!
The shop I recommend is located near the JR Akihabara station in Tokyo. It is a wonderfully shady shop that sells fetish costumes, school uniforms, porn, and of course used panties. If you are in to fetish videos of women having their heads shaved, it sells those as well (wtf?).