airfare to Asia is expensive during the summer. Don't be surprised to pay $1000 or more. try checking with an actual travel agent. Especially those that specialize specifically for travel to japan. They sometimes have negotiated fares with the airlines directly that are typically cheaper. How much cheaper? It really depends..from 50 bucks to 200 bucks.

most of the asian carriers are quite pricey-Japan AIrlines, Singapore. The cheapest one would be Korean. They have a non-stop from LAX- NRT.