"According to Yahoo, the information that was stolen didn't have passwords or any other information that would allow unauthorized users to carry out user identity verification."
So yahoo is forced to disclose a data breach by law. But they add to it the nothing important was taken. I would like you to think for your self for a minute. Does a burglar go around robbing homeless peoples shopping carts? People go after what has value, and they stole something. This story should read Yahoo Japan tries desperately to cover their data breach but has to admit to loosing user ID's.