We found some good information on Yokota AFB website. If we fly to NRT, we could stay at Yokota and fly space A on into Kadena when the next military flight leaves. (we are retired Air Force). But that only happens once a week.
Called the pass bureau for SWAirlines today about passes on NWAirlines from SEA to NRT. Good price but the agent says most times the flights go and come full since NRT is their hub for that part of the world.

Every part of the plan has a glitch! So we think we'll wait till next year to go when we should have 2 weeks of vacation to devote to this adventure. We have learned so much about flying Space A and non-reving internationally. I am building a file so that next January we will have much of the research done.

Any additional information we can collect would be helpful!

Thanks so much for your input