I've J/S'd NRT-ATL on DL. No problemo. Went to the ticket counter 2:00 prior to departure and they took great care of me. A ticket agent helped with the departure tax thingy and then walked me to the gate and onto the airplane and introduced me to the crew. Very smooth operation. They assigned me a seat in coach but just before push back moved me up front to an available seat in business class. Good luck.