Google Flights is offering Roundtrip Nonstop Flight from Los Angeles (LAX) to Tokyo, Japan (NRT) from $428.
This is through ZipairStep 1Go to Google FlightsStep 2
Select to fly from LAX to NRTStep 3
Google makes it easy to see which dates are the cheapest, but here are some examples of the $428 flights
November 2, 3, 5-9, 12, 13, 22-30