Japan is an odd case.
Seems they didn't want to have many confirmed cases because they wanted to stage the Olympics this Summer (!) so they simply didn't test much.
The countries that have tried a minimal response to the virus seem to be doing poorly recently. The UK initially planned the Dead Granny strategy of herd immunity, then realized that was going to kill lots of UKers, followed by their PM almost dying of the disease. Had to change course.
Sweden was trying a very relaxed approach, even keeping schools open. It seems to be failing and they seem to be scrambling for stronger measures.
Turkey wanted to just tough it out.
Russia thought they could just ignore and not report on the virus.
Brasil was also taking a tough it out it's not that big a deal approach.
Iran thought it was a hoax, until political leaders started dying.
Looks like none of those will have happy endings.
The US combined a disregard with terrible preparation, lots of downplaying and disorganization, and a very late start while still taking half and 3/4 measures. I think Italy & Spain fall into the disorganized category.
Countries that employed a lot of precautions, shut down the economy early, and have conducted lots of testing have unsurprisingly fared best. China, South Korea, Vietnam, Germany, Austria, Denmark. Also Taiwan and Hong Kong. Singapore I think as well, but I haven't really checked.
There should be a lot of data and reports and books about the global response. But I think that's a quick early recap.