All-new Chinese Toyota Yaris has a unique styling compared to the international Yaris/Vitz and is actually based on the Vios. I am not sure which JV is responsible for the production for both the Yaris and Vios.
Source: http://car.watch.impress.co.jp/docs/news/20130420_596802.html
Source: http://car.watch.impress.co.jp/docs/news/20130420_596802.html