Thanks a lot for these detailed instructions. Very helpful! My passport allows visa-free entry into Japan, so that should be OK. However, I emailed with Garuda customer service
<[email protected]> and dictated a note about interlining the bags and they said they said they would add the note and sent me a screenshot. So I am very hopeful GA will tag the bags all the way to DCA on JL/AA. It sounds like the connection will be good if my GA flight is on time. I'm saving the info you've given me. Thanks again!