A few minutes ago, I just met someone who is Japanese and spoke to her in Japanese.
Here is the gist of the conversation:  All in Japanese, but for now, translated in English.
J-P (Japanese Person)

J-P:  Oh, you don't look like Japanese.
Me:  Okay, I'm not Japanese, I'm Okinawan.

J-P: (confused) But you don't look Japanese at all.
Me:  From Japanese eye, I don't look Japanese, but in Okinawa, it's different.

J-P:  What do you mean?
Me:  In Okinawa, I actually look like an Okinawan.  Through Japanese lens, I don't look Japanese.

J-P:  Oh yeah, in Okinawa.  Right.  They look Indian or mixed.
Me:  No, not Indian, but Okinawan.

J-P:  (Smile with bit of apprehension)
Me:  Are you on vacation?

J-P:  No, I live here (in Berkeley)
Me:  How long have you been here?

J-P:  Fifteen years.
Me:  Oh, okay nice to meet you.  See you later.

~to be continued...

In terms of what the "faces" of Japan look like, let the people speak:

Mixed Roots Japan:  From https://www.facebook.com/groups/mixedrootsjapan
MixRoots Japan originally started as a regional community for HapaJapan, one of the half a dozen mixed roots communities in Japan.
This has greatly helped mixed roots individuals in Japan interact with each other and overcome former prejudice, think about their roots, think about the future of their mixed roots children. We serve individuals who are of mixed roots, i.e. multiracial or parents of mixed roots children, single parents with mixed roots children, Nikkei, people of complex history that have profoundly changed their roots (i.e. post war immigration, exodus, forced migration, trafficking), mixed roots individuals who have faced prejudice in society such as those of Ainu, Okinawan, Korean, any foreign or cultural descent, etc.

Here is one of three-part documentary on the group: http://www.youtube.com/watch?v=c8ujOkzajQs
According to the video:
There are 2,150 thousand immigrants registered in Japan. 
In Tokyo, out of 10 marriages, one is International marriage. 
Globalization is rapidly growing in Japan.
"Instead of judge a person through tainted lens, one should accept people for who they are."

One more project of "Half" interest:  http://www.hafujapanese.org/eng/project.html

So I ask, what does "Japanese face" look like? 
What is at "work" around the issue of visual fixity of racial authenticity in Japan and other nations?