-redux:

anime characters are never white until explicitly said so anime characters are never white until explicitly said so anime characters are never white until explicitly said so

See also: Why do manga characters look Caucaisian? by Matt Thorn:

Key passage (emphasis and ellipses mine):

“The grotesque racial and ethnic stereotyping of former decades has been largely purged from the mainstream, but only to be replaced by less offensive, yet nonetheless stereotyped, signifiers. Non-Europeans living in a European-dominated society absorb these standards themselves, and not only are continuously made to be aware of their "otherness,” but adhere, out of necessity, to the Eurocentric system of signification.

[…]

Japan, however, is not and never has been a European-dominated society. The Japanese are not Other within their own borders, and therefore drawn (or painted or sculpted) representations of, by and for Japanese do not, as a rule, include stereotyped racial markers. A circle with two dots for eyes and a line for a mouth is, by default, Japanese.

It should come as no surprise, then, that Japanese readers should have no trouble accepting the stylized characters in manga, with their small jaws, all but nonexistent noses, and famously enormous eyes as “Japanese.” Unless the characters are clearly identified as foreign, Japanese readers see them as Japanese, and it would never occur to most readers that they might be otherwise, regardless of whether non-Japanese observers think the characters look Japanese or not.“