Yuko was checking out an online message board where people mostly sell and trade things, and she saw one post about a guy requesting help finding the real Dragonballs that will permit him to embark on a world journey. Some of the replies continued with people suggesting places in Yokohama where his hunt could begin. The tone of the initial post was very serious.
DRAGONBALL is a very famous manga by Akira Toriyama that follows the martial art adventures of Sangoku and his friends and family. The Dragonballs are 7 magical spheres that when collected cause a huge dragon to appear who then offers to grant a wish.