An aside - I know of one younger Japanese Captain (I think less than 1,000 hours PIC TT maybe 6000 jet) who is now F/O with Emirates for the last 2 years or so.
Years ago the THOUGHT of a Japanese leaving Japan was unthinkable.
On the flip side Skymark in Japan cleared (courtesy of JCAB) their first Female Captain about 6 months ago - from Korea - with another in the system I believe (but could be wrong...could be more).
Much was made a couple of years ago when JAL (through subsidiary JEX) cleared their first lady Captain - ceremony, news reports etc.
Mr Dylan was right - the times are indeed changing, whether through desire or necessity probably a moot question.
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.
Interesting question - apologies if perceived as a thread drift.