The developers behind Siri must have something against the Japanese. If not them, then their accents. If it's not that, then they probably weren't able to find someone Japanese to help them tweak Siri's voice recognition abilities while she was still in development.
Because if they did, this probably wouldn't have happened. By this, I mean the crap that this Japanese guy had to go through just to access his work email. (Which he wasn't really able to do in the end, by the way.)
Siri just about suggests every other word that sounds like 'work' except the actual word itself, which was what the guy was trying to say. The video is pretty hilarious, although I'm not sure Apple will agree with me.