NW will get you to NRT (daily) or KIX (3x weekly). NW also has a AMS non-stop (daily). Latin America can be covered via CO. West Coast travel via AS. NW has an excellent FF program (both AS and CO are partners), especially for us who buy WBC tickets.
Just my biased opinion....
------------------
"If we don't succeed, we run the risk of failure."
--Vice President Al Gore