Originally Posted by izzik

Went through this process twice over the past 4 days to enter Japan.

As soon as you get off the jetbridge from the plane, they'll be looking for the screen with the blue/pink 2 boxes. Pink went in one direction; blue went the regular route. I'm not sure why people had the pink screen - because of some kind of rejection? Or they just didn't do the process in time. For the blue screen folks, someone will hand you a pink flyer entitled "health screening" or something. It's informational but don't throw it away until you are into the country.
Keep flashing the blue screen until you get to immigration, where you scan the immigration QR code (with yellow bar) while you are speaking to the officer.
After passing immigration, head to one of the several kiosks dotting the area (2 kiosks per column). There, you scan your customs QR code (blue bar) and passport, then follow directions on the screen.
Get your checked bags (if any), then walk through the automated gate (no need to scan codes).
That's it.