Tida Weather Station, Tokyo UFO Sighting (January 25, 1919) — USAF Files
In January 1919, observers at Tokyo's Tida Weather Station reported a massive, pale glow accompanied by heavy vibrations, according to released US archives.
Historical Context
The early twentieth century represented a period of profound transition in human understanding of the upper atmosphere and aerial capabilities. In 1919, the era of fixed-wing flight was in its infancy, with aviation technology still struggling to establish the baseline expectations for altitude, speed, and maneuverability. During this period, the sky was largely considered a domain for natural phenomena, such as meteors, planetary alignments, and meteorological events. The concept of unidentified aerial phenomena was not yet a formalized field of study, as the technological capacity for sustained, controlled flight was limited to a small number of experimental and military craft.
Geographically, Tokyo served as a critical hub for meteorological observation during this era. Weather stations in the region were vital for tracking atmospheric shifts that influenced maritime and terrestrial navigation. The Tida Weather Station, positioned within this network, was part of a coordinated system of observers tasked with recording atmospheric changes. Because these stations relied on visual and auditory monitoring of the horizon, they were uniquely positioned to document anomalous events that crossed the boundaries of known meteorology.
The Incident at Tida Weather Station
On January 25, 1919, investigators for the United States government recorded an unidentified-object incident at the Tida Weather Station in Tokyo. This specific case was later released to the public on May 8, 2026, as part of the Presidential Unsealing and Reporting System for UAP Encounters (PURSUE). The documentation of this event originates from U.S. Department of Defense files, indicating that the incident was flagged for official review by American authorities.
The primary observation involved a pale glow appearing in the northeast direction. According to the official records, this glow was positioned at an altitude of 35 degrees above the horizon. The scale of the phenomenon was significant, described as being approximately one and a half times the diameter of the moon in size, and it was noted for possessing considerable brightness. The object was observed moving horizontally across the sky before it eventually disappeared from view.
The visual component of the event was accompanied by a physical sensation. The released documents state that a heavy sound was heard during the sighting, an auditory event so intense that it caused doors to tremble. This acoustic phenomenon suggests a high-energy or high-pressure event occurring in the vicinity. The scope of the event was not limited to the Tida Weather Station alone; reports from other nearby stations indicated that a similar phenomenon had been observed across the broader district, suggesting a widespread atmospheric or aerial occurrence. While the specific number of witnesses was not recorded in the released documentation, the coordinated reports across multiple stations imply a significant number of observers were present.
Classification and Analysis
The Tida Weather Station case is classified as a visual sighting reported by ground or air observers. In the study of unidentified phenomena, such cases are often analyzed alongside other historical sightings of luminous, moving objects. During the early twentieth century, many such reports were attributed to atmospheric optical phenomena, such as sundogs, lenticular clouds, or the refraction of light through ice crystals. Astronomical objects, including the planet Venus or meteors passing near the horizon, also served as frequent conventional explanations for bright, moving lights.
Under the current protocols of the All-domain Anomaly Resolution Office (AARO), all records released under the PURSUE program are designated as unresolved by default. The federal government has not reached a conclusion regarding whether the 1919 event was the result of an anomalous phenomenon or a conventional one. While later decades saw the emergence of experimental aircraft and high-altitude weather balloons as potential candidates for such sightings, the 1919 event remains officially unclassified, with neither an anomalous nor a conventional explanation being confirmed by the authorities.