Voice Act in my Visual Novel

I need a few specific types of voices for my video game, including two young adult males with Japanese accents, a middle aged woman with a Japanese accent, and a young adult girl, also with a Japanese accent. I also need an African-American young adult male voice actor, an older woman with a South African accent, and a middle aged African-American woman. This is for an LGBT visual novel that focuses on the characters getting past their trauma and learning to live in the present rather than the past or future.