nothing wrong to discuss the history, actually it's quite interesting to learn more.

the problem is japan govt refused to accept the war truth and mistakes made, so they intentionally changed the history books that will lead to more misconception to the future or should say even now! they still have the "lucky" sense to mask out the facts they don't want to confront.

current japanese royal family are not the descendant of xu fu but one of them claimed they are.

believe him, if god father relationship also count as descendant