Regards Japan only - it would be interesting if NCA or Air Japan have African/Afro Americans in their employ as both have either international basings or no residency for expats.
AJX have two black pilots that I can immediately think of. One is an FO and one is just finishing his command upgrade (he may well have already passed it but I haven't seen him around for a bit). There are also two female pilots; one is just going through training and the other is getting to the end of her command upgrade. Of this lot, three are from the States and one is from Oz.