So, Donald Trump is going to have another shot at the American presidency.
It would be bad for America and bad for its allies, including Japan, if he won. An already shaken world order, supposedly based on the international rule of law, would be in for another battering.
This would not just be a matter of one administration based on one party replacing another as broadly happens in most Western democracies from time to time. It would be an assault on the whole Constitution of the United States and on the binding forces that have kept the Great Republic together, from its founding in 1787, although of course with the bloody interregnum of civil war along the way from which it in fact emerged stronger.