This deal won’t last long. Fly Los Angeles to Tokyo on ANA, Delta, Singapore and United as low as $444 round-trip.
Airfare Steal: Los Angeles to Tokyo from $444 Roundtrip on Four Major Airlines!
http://www.secretflying.com/2016/07/los-angeles-to-tokyo-japan-for-only-444-roundtrip/
Each of the airlines has its own rules and restrictions, see the blog post for details.