Matsumoto Airport (????, Matsumoto K?k?) (IATA: MMJ, ICAO: RJAF), also known as Shinshu-Matsumoto Airport, is an airport located 5 NM (9.3 km; 5.8 mi) southwest of central Matsumoto, Nagano Prefecture, Japan. Opened on July 16, 1965, Matsumoto Airport is located approximately 9 kilometers southwest of the center of Matsumoto city, straddling the border between Matsumoto and the city of Shiojiri, Nagano. The airport is located roughly in the center of Nagano Prefecture. Regularly scheduled flights are for domestic service only. It is located at the highest elevation (657.5 m) of any commercial airport in Japan, and is surrounded by high mountains, which impose restrictions on the type of aircraft which can service the destination. The runway was lengthened to 2000 meters in 1994 to accommodate jet aircraft, and a new passenger terminal building started operation. In the past, the airport was served by Japan Air System, mostly using MD-87 aircraft before being integrated into JAL. In FY 2013 its load factors passed 70% for the first time since its expansion. The airport and surrounding region cater to mountaineers during summer months and to skiers during winter months. Japan Airlines operated regular service to Osaka until 2010. However, since recovering from bankruptcy, Japan Airlines has resumed seasonal service to Matsumoto Airport from Osaka Itami Airport using the Embraer E170 aircraft.