Nor should Japan open up to Americans anytime soon, for self preservation, and arguably until a mass distribution freely available vaccine has circulated for some time - or at least reliable medication if a vaccine is not physically viable... I have heard it elsewhere that this might be just another thing that humans must adapt to like seasonable flu. I certainly hope not.
Regardless, gratitude for the update on title subject matter. Better to prepare for the worst than for the best from wishful thinking alone!