Tadanobu Asano — Japanese Actor born on November 27, 1973,

Tadanobu Satō, better known by his stage name Tadanobu Asano, is a Japanese actor... (wikipedia)

There are lots of actors who insist on speaking the lines themselves, and you hear the same thing from directors and the audience, but I don't think it's worth getting het up about. I think it makes more sense to use someone who speaks that country's language: that's what voice actors are for.
Basically, people in other countries don't want to have to work quite as flat-out as they do in Japan.
I have blood from Dutch and Norwegian.
If you're famous, you're not free.
Because I feel 'Thor' is the beginning of finding my roots, and I found that I have family in America, I want to take my time and put effort on my future work so that foreign people get to know me better, and I also want to enjoy that process itself!