It really varies. I live in San Diego, and I was able to score tickets out of LAX for $420 - which is insanely cheap. It would have cost twice that usually. Sign up for "Scott's Cheap Flights" and wait for a fare to pop up. Japan usually pops up once a month at least. I was really surprised how cheap Tokyo was - both food and alcohol. Yeah it can get pricey if you're going to the five star sushi places, but honestly even cheap sushi was as good or better than the shit in the states.