What's the origin of the Japanese people ?

[Minty]

...or is there something else that hinders her power of discernment?
.

Mind you the Japanese themselves can't tell I am not Japanese. It is them who mistaken me as one of them. I often get them approaching me because they thought I am Japanese. Most of the time I can tell Japanese, Korean and Chinese apart, I never approached a Chinese who is Japanese before.

You may be able to tell the different East Asians apart but many other white people can't, my experiences tell me that.