Thanks for the lesson.....Its really poor science comparing infection rates between the two countries. From what Im seeing and hearing testing in Australia is relatively easy to access with many thousands of tests per day and thus a better measure of infection rates. Here in Japan, in our experiece, testing is pretty much restricted to those showing symptoms (or those paying for travel etc), and often people have to wait for testing until those symptoms escalate. That's been pretty much the strategy here from the start.
My comment was not intended to be scientific. It was just an anecdotal comment about there being less new cases reported in Japan than Australia on the day we happened to look and not on the days either side. I found it amusing.