Originally Posted by
ATLSFO0515
Thank you very much for this tip and I was able to change to the desired flight directly on the JAL website. I honestly hadn't even contemplated this approach as I always expect having to discuss flight changes with the ticketing airline, hope for award bucket availability, etc. The change here was a far easier solution than I'd originally anticipated.
Call AA and have the ticket reissued. Unless the process changed, you can pick a new fligth on the Japan Airlines web site, but AA still need to resissue the ticket. AA may proactively reissue the ticket.