Where did you find this bit of auto industry info?
Had a hands on look at a Yaris in Canada. Labeled as Japan made.
Also see: http://www.toyota.co.jp/en/about_toyota/manufacturing/
Much higher quality than the Echo it replaces...solid with feel of higher-end vehicle. It has been sold in Japan as a second-generation "Vitz" since February.
So as not to dampen the thread, it was supposedly styled in France.