Air Nippon Co., Ltd. (ANK) was a Japanese regional airline that operated as a wholly owned subsidiary of All Nippon Airways (ANA). Founded in 1974, it served domestic routes throughout Japan, complementing ANA's wider network with regional connectivity. The airline operated under the IATA code EL and ICAO code ANK, using the callsign ANK AIR. It functioned primarily as a feeder carrier, linking smaller regional cities to major hubs such as Tokyo Haneda and Osaka Itami. In October 2012, Air Nippon was merged into its parent company ANA, ceasing to exist as a separate operating entity. Its operations and routes were absorbed into All Nippon Airways, consolidating ANA Group's domestic services under a single brand.