Kirai - Un geek en Japon A great site about Japan, with a really funny article describing Kancho and "The Kancho World Cup!"
Kancho "Dong Chim" -The Game! Holy crap! It's a Kancho game where you have to fire kancho rockets into your opponent's butt while avoiding their poop-bombs. If you hold down the mouse button you can charge up and unleash a SUPER KANCHO! - Note this game is in Korean, but it's easy to figure out without knowing Hangul.
Outpost Nine The most widely known, and most thorough account of one man's experience with kancho.
The Tao of Kancho An English teacher in Aomori ken who grew up in Japan writes about Kancho, then and now.