Yes you can, but that doesn't mean you should...
I'VE SORT OF BEEN JOKING ABOUT THE WHOLE "CANADIANS ARE SUPER NICE" THING, BUT THIS IS PUSHING IT.
Here we have the latest in weird stuff coming out of Japan: a sudden and seemingly arbitrary fascination with black American culture. Something tells me that there's a secret Japanese weirdness community that gathers every now and then. They all gather in a big room, and throw a dart at a giant dartboard with different cultural trends on it. Whatever the dart lands on, that's what Japanese youth adopt. I wouldn't put it past them...
Everyone should start calling them by these names. Some people may not be Seoul-d on the idea, but who cares!