1000mi East Yokota Japan reported light formation observation — April 1961

Sadowski SUBJECT: Unidentified Object On 27 Apr 61 at approximately 1700 hrs, while on a routine flight from Okinawa to Yokota AB, Japan, the crew of a Far East American Airlines aircraft, a-1, observed an unidentified object. The object was first sighted at approximately 1000 miles east of Yokota AB at an altitude of approximately 35,000 feet. It was observed for approximately 20-25 minutes. When the aircraft approached to within approximately 15 miles of the object, it appeared to accelerate and climb rapidly, disappearing from view in approximately 10 seconds. The sighting was reported to Yokota AB control tower upon arrival and the necessary information was forwarded to higher headquarters.