No, he is not racist. And there is more than one black character in Bleach. To list a few: Tosen, Zommari, Harribel, Yoruichi, Love and Zennosuke And there's few black people because you're relating the story to your life in AMERICA where blacks are like 1/2 of the population. Bleach and Kubo's home Country is in JAPAN where there aren't many Black people. so he isn't racist for making his story how it is in his country