Trading in Tokyo?

Forgive my somewhat vague and naive question; any thoughts/experiences you could offer would help.

I'm currently a Japanese major/ Mathematics minor at a top LAC (i.e. one that is actively recruited at) and am greatly interested in trading.

I have two questions, however. Given my somewhat unique major/minor combination, do you think this will hurt my chances compared to Econ/Math-only majors?

Second, since my major is Japanese I would obviously prefer a post in Tokyo. Is it uncommon for undergrads to be send to offices abroad right away (i.e. if I were to get a job would the prefer sticking me in, say, New York?) China seems to be the hot market nowadays anyway, and Hong Kong seems to be the places many people wish to go for trading jobs; would it make me a more desirable canidate given that I WANT to go to Tokyo and can speak/read the language?

Thanks for you help!