Incident Report — Misawa AFB, Japan, 21 June 1950

This document is an incoming military message dated 23 June 1950, reporting an unidentified aerial phenomenon observed on 21 June 1950 at 0605 Z. The sighting occurred at Misawa Air Force Base in Japan. The observer, identified as an Air Force officer with 1100 hours of flight experience, reported seeing a single, circular object with a diameter of 30 feet and a thickness of 5 feet. The object was described as having a highly polished silver surface. According to the report, the object was traveling parallel to and 1000 feet above an F-80 aircraft. The object was observed for approximately 20 seconds at an altitude of 7,000 feet. During the observation, the object tilted at approximately 45 degrees to the horizontal, flashed in the sunlight, and appeared to shimmer. It then returned to a horizontal position and rose almost vertically by about 1000 feet before disappearing. The speed of the object was estimated to be between 650 mph and 975 mph. The observer noted that no sound could be detected, likely due to the presence of other aircraft in the vicinity. The report concludes by stating that no other observations were reported at the time and that supplementary reports with sketches were to follow. The document is marked as unclassified and includes instructions regarding its declassification schedule.