China? China is why we're in this mess. They were unable to contain it, which is why it's now a pandemic. Their actions to shut down society (which the US is now taking, well before our hospitals are overrun) came way way way later.

Japan, I don't know about.

South Korea is doing a good job, however it only took one rogue patient (patient 31) to go from 'well-contained' to 'nation-wide' epidemic. This is why containment measures are doomed to fail if the goal is to prevent the spread entirely. It only takes one person to screw it up.