Did you email them and ask about it? Will they accept your employee ID and copy of return itinerary as nonrev? Asia usually recognizes the use of "airline staff travel" which is the term I use at agent desks and on the phone. You can always go to tripadvisor forums, and send private message to GOPBI (you will find him active in BKK and air travel forums. He is airline emp who lives in BKK. I believe he has lived in Japan ( and then some) and is from Hawaii. Hope that helps.