So, I'm part Japanese?

I recently found out something that changes my identity forever. You all should ask about your histories with your older relatives. You could learn something new. N E wayz, my great-great grandfather was a Japanese man. And there is proof. A cousin of mine just died of a cancer that predominantly occurs in Asian men. I would have never in a million years guessed this. The struggle now lies in how it inter-twines with Jamaica. I gotta do some more research and try to figure out more of my history. Its exciting but there are a few pieces of the puzzle missing.