Hi All !
Sorry to chime in so late, but as an African American, who's been living here in Japan now for about five years, I couldn't resist.
I love Japan. I work, I pay my taxes, I have been living my life to the fullest here. I have never experienced any form of racism directly. I am an overweight, fat and painfully average looking African American male in his mid-thirites. I have worked one job my whole time living here. Everything is good for me so far. I am not in the military.
In addition to all of that, I have published two books on Japan; one on hotsprings and the other on sake, both can be ordered online. In 2008 I plan to have two sold through a major bookstore in Japan. You can also visit my website, the url is on my profile.
Had I experienced racism I would have never published those two books. I would say don't worry about racism so much. I know people and places in America that are far more open about their racial hatred of blacks than in Japan.