The Japanese Air Force One and Japanese Air Force Twoare the radio callsigns of the two Boeing 777-300ER aircraft used by the government of Japan for overseas travel by the Emperor, Prime Minister and other high-ranking officials. Each aircraft has a capacity of 140 passengers and can be used for emergency evacuations of Japanese citizens and overseas deployment of Japan Self-Defense Forces personnel. The aircraft are operated by the Japan Air Self-Defense Force. The Boeing 777-300ER replaced the original Boeing 747-400 aircraft in early 2019.