Why is Japan still open to international travelers?

While Italy and Spain on lockdown with US, UK, France and Germany enforcing strict travel restrictions due to coronavirus outbreak, Japan is still open to accept travelers from outside its country.  Interestingly, people are taking up on that opportunity and coming to Japan in this uncertain time.  Is Japanese government out of its mind?  John talks to those among his viewers who dare to consider traveling to Japan about what to expect upon arrival.