The Bloomberg article exacerbates the bigotry many Japanese have against their own fellow citizens. In the caption of the first picture: "She’s not all Japanese, but she was Miss Universe Japan 2015." Yes, she is "all" Japanese. She grew up in Japan, with her Japanese mother, attending Japanese schools. This is the subtle bigotry toward people who are "half" (as they're called in Japan) rather than "dual". Many Japan…
Just because she qualifies as Japanese from your point of view doesn't mean that the Japanese have to view it like you. White savior complex much? I've spoken with Japanese friends about hafus and their point of view was that people do not materialize out of thin air, but rather are the genetic conglomerate of their ancestors (which is hard to argue against) and thus links in a chain -- which would make her less Japanese. And that seems fine to me, as long as she is not discriminated against for being viewed less Japanese.