Chitose Hokkaido Japan radar-visual unidentified-object report — December 6, 1957

On or during December 6, 1957, at or near Chitose Hokkaido Japan, Japan, the source reports the following sequence: BRIEF SUMMARY OF SIGHTING: Approximately 15 persons observed a very bright light in the sky. The light was first noticed at 0845Z and was tracked on ground radar. The report mentions a "Negative film is forwarded of an unidentified flying object observed visually and by radar on Hokkaido, Japan, 12 December 1957." No photo or image is included in this scanned document. AIR INTELLIGENCE INFORMATION REPORT COUNTRY OF AREA REPORT CONCERNS: JAPAN ACTIVITY SUMMARIZING REPORT: MAJOR 17 1958 ITEM: UNIDENTIFIED FLYING OBJECT REPORT BY: CAPTAIN JOSEPH A. PARA MARKED "U" INCIDENT MUST NOT BE MARKED OR REPRODUCED.): (U) Unidentified Flying Object SUMMARY: (GIVE FACTORS ON WHICH HIGHLIGHTS THE SALIENT FACTORS OF NARRATIVE REPORT. PARA MARKED "U" INCIDENT MUST NOT BE MARKED OR REPRODUCED.): Negative film is forwarded of an unidentified flying object observed visually and by radar on Hokkaido, Japan, 12 December 1957. APPROVED: [Signed] ATLIC, Director, ATILO DCS/Intelligence UNCLASSIFIED SUPPLEMENT TO AF FORM 112 5TH AF ATOLLO 6 December 1957, an unidentified object was observed over the sea to the west of the southern tip of Hokkaido, Japan. Color was reported as greenish-white, changing to yellow or white with orange color. It was reported to be stationary for a period of twenty-five minutes, then it started to move erratically with a zig-zag pattern. The incident was reported by message CHED-OPS 1139, DTG 130925Z, December 1957, Detachment 15, 548th Aircraft Control and Warning Squadron, Misawa Air Base, Japan. The mean of these average speeds was 1262 mi/hr or a value not consistent with the data reported. If the computed speeds at 0.0002 or 766 mi/hr were used in place of the reported 310k to compute ranges.