Delta Airlines: BIG JAPAN SALE: flights to Tokyo ~$555 roundtrip from 10 US cities!

Flights from LA and San Diego are nonstop; the rest have one connection en route.
Pro-tip: you can do real-life Mario Karting through the streets of Tokyo. No joke.
No bag fees, etc
Tool: https://www.google.com/flights/
TO:
Tokyo (TYO)
FROM:
Chicago (ORD) – $555
Dallas (DFW) – $555
Denver (DEN) – $555
Houston (IAH) – $555
Los Angeles (LAX) – $579
Miami (MIA) – $555
Phoenix (PHX) – $555
San Diego (SAN) – $561
San Francisco (SFO) – $555
Washington DC (DCA) – $555
Washington DC (IAD) – $555
WHEN: Lots of availability starting September through December
NORMAL PRICE: $900+
AIRLINE: Delta from all cities but LAX/SAN which have availability on JAL (Singapore as well from LAX)
BUY BY: I suspect these fares will be gone within 24 hours if not sooner