ADVICE TO OP
Find a japanese boy in the United States. Don't make this more difficult than you have to. Asian Avenue.com or something like that. Craigslist and say you're ONLY looking for a japanese person. A great hint --> Asian cultures are EXTREMELY loyal to each other and are pretty "Clingy" because of it. In America I have witnessed hundreds of Churches and Hang outs that are predominantly Asian-Only. They feel comfortable because of it. You just have to find a Japanese one. The place to look? Which is going to be kind of funny...
Make friends with Asian people at your school, or if that's not an option then look at flyers at Oriental supermarkets and Chinese Fast food. Often times, these flyers will be for asian people. -Is it extremely sad that I know this?- Even though asian people are extremely exclusive, they won't mind having a caucasian friend. ESPECIALLY when they're in a caucasian nation. You'll be like... The link to the outside world.
However, don't get stuck with a single group of asian friends. If they're not Japanese, then I reiterate. They are not Japanese. Abandon them, move to the next group. Another place that this wil work are colleges that have culture clubs. Find the Asian / Japanese culture club in there. You won't even have to talk to anyone. Just be reading some manga. People will talk to you.