Per Michael Hampton's answer, you can transit airside at Haneda for up to 72 hours without a visa.
Furthermore, the current Covid-19 entry restrictions only affect entry, not transit.
As such, if your trip is in a single booking, you're OK.
Visa required, except for Passengers transiting through Tokyo (HND) or Osaka (KIX) with a confirmed ...
The Government of Japan will be extending its entry ban to the U.S.; any foreign citizen except for permanent residents will be refused entry if they have traveled to the U.S. in the past 14 days. The ban will likely be in effect in just a few days, so there's a very good chance that you won't be able to make the transit.
If you stay airside, I am not sure, ...
Yes, you can transit without a visa at Haneda airport, if your connection time between flights is less than 72 hours.
If you have not been to any of the areas affected by Covid-19 then you may also be able to get a Shore Pass so that you can enter Japan and stay landside during your layover.
Timatic, the database which airlines use to verify passenger ...