Ubisoft Japan published the Japanese version of the Watch Dogs 2 Story Trailer today. The content of the video is the same as the EU / US version of the Story Trailer but this time in this video each characters speaking in Japanese! The voice actor of Marcus for example is Yuya Uchida.
On the official website you can find the voice actors list for each characters if you are interested in them. The new Watch Dogs 2 release in Japan on December 1, 2016 on PC, Xbox One and PlayStation 4