Tokyo Yakuza is a shared world project seeking science fiction stories of 2000 to 3000 words that help continue the world of Tokyo Yakuza. Since this is an intellectual property owned by the publisher the characters you create will belong to them. So basically this is a work for hire project. Payment is 6cents a word plus royalties. You can find the details here, just scroll down the page for the guidelines.
Thanks to Michael Bracken for the link!