I would do as other people have said an exchange program in college. I will be attending Sophia University starting in a couple weeks as and exchange student from Seattle.
Regarding to the post above: there are a few misconceptions about exchanging.
1) It costs a lot..if you go to a school like mine (Seattle University)...we have a direct exchange program with Sophia, since it is set up like that, i continue paying my home university like someone said earlier while im in japan. All my scholarships/financial aid applies. Sophia has partnerships with 120 universities worldwide according to it's website. Since there is a partnership set up with my school...it's pretty much guaranteed that you are able to go to Sophia as long as you have a 3.0 GPA..which is pretty easy.
Partner Universities/Colleges List
link of schools that sophia is partners with.
2) Major...yes it is true that you might get off track from your major, but it really depends on what you plan to study.
There are so many teens now that have this japanese-craze in them..i have many friends around your age that are into this japanese frenzy and it's really funny. it's like japan is taking over teens here in the US.
You still have a few years....things change. I mean...i'm 20 now and you don't even know how many times ive changed on what i wanted to major in or do in life since i was 14. But you sound like one ambitious kid..you remind me of myself when i was 14 through the maturity in your writing..most people at 14 are still like little kids...being immature and stupid.
But i would stick to going to school here in the US and do an exchange for one full year. Also, look into doing an exchange program over the summer during high school....i did it as a 10th grader and it was really fun. My sister is doing the same trip this summer. You should look into doing a whole summer program if you save up enough money. I know some people who have done exchanges in high school and spent most of their senior year in Japan....im thinking that it's not available in Oklahoma...the probable future home of my Seattle Sonics
Then find a job in Japan after college...if you major in like international business like i am it will be a good basis/set up for your future ambition of working with the Japanese in japan.