Project 10073 Record Card — Tokyo, Japan, 20 May 1955

This document consists of a Project 10073 record card and an associated operational immediate cable regarding an unidentified aerial phenomenon observed on May 20, 1955, over Tokyo, Japan. The sighting occurred at 0745Z and lasted for approximately 14 minutes. The primary witness, described as a very experienced pilot, reported observing a single swept-wing object at an altitude of approximately 60,000 feet. The object was noted to have disappeared while leaving behind puffs of smoke. The location of the sighting was identified as being between the Tokyo radio range and the Daigo homer. The report indicates that no photographs were taken and there was no radar contact. The official conclusion recorded on the card is that the object was possibly an aircraft, but that the available data was insufficient for a definitive evaluation, and further analysis was required. The cable, which references MAG-11, confirms the details of the sighting and notes that the report was being forwarded for further review. The document was later declassified, with the classification status changed to unclassified under authority AER 205-1D.