No. Does Canada require some test? Then you do not need it. Covid test to transit Japan airports not required nor to board NH flights (ANA). You cannot even change departure terminals in NRT unless you have every requirement to enter Japan. Entering Japan takes 2-6 hours thanks to some of the world’s most complicated and time airport consuming entry procedures, and impossible unless you live there already, have a J-passport, or a new entry visa. Visa exempt entries are banned in principle, and they have no tourists for 2 years. When you arrive at a Japanese airport connecting passengers will deplane first and directed to your departure gate. Very easy, not eveything in NRT airport Term 1 is open, but there a a few options.
It is a legitimate question asked around the world. Even in Japan medical experts are debating why hospitals are filled with asymptomatic patients to the point that actually ill people are turned away (who have other diseases, babies died even). At the same time they admit the virus “cannot be contained by isolation” because it is in fact, endemic. Time to cancel medical theatrics and move on.
Thai Pass. A bit of paper to show at the airport, going in. It does nothing to protect from a virus. You can leave anytime your want. At that moment, you are considered to be diseased and then have to do another Thaipass to re-enter. Fascinating. What is the purpose whilst Thailand is lousy with koronavirus already?