I think there should be some worldwide rules changes about that...
It's always like that with China, Japan, and Korea
why can't they learn from Europe when some people have 3 or sometimes even more citizenships?
What if dad is Korean and mom Japanese, why a child needs to suffer and "pick" just one citizenship?
Also why the hell in some countries it takes such long time to "obtain"/gain citizenship?
Like seriously, some of people should just come to Europe and learn, and open their minds...