As a result of World War II, Japanese planes are generally forbidden to fly over Tokyo. Therefore, Japan constructed airports outside Tokyo. Narita International Airport in Chiba Prefecture is the major gateway for international travelers to Japan. Japan's flag carrier Japan Airlines, as well as All Nippon Airways, have a hub at this airport. Haneda Airport on the reclaimed land at Ōta, offers domestic and international flights. As of 2018, some flight routes into Haneda are permitted through Tokyo airspace.