Japan Airlines is the flag carrier of Japan. JAL is headquartered in Shinagawa, Tokyo. Its main hubs are Tokyo's Narita and Haneda airports, as well as Osaka's Kansai and Itami airports. The JAL group, which includes Japan Airlines, also comprises J-Air, Japan Air Commuter, Japan Transocean Air, Hokkaido Air System, and Ryukyu Air Commuter for domestic feeder services, and JAL Cargo for cargo and mail services.
ソース: Wikipedia