The Utsuro-bune Legend
One of the earliest recorded accounts that has drawn comparisons to modern UFO encounters is the legend of the Utsuro-bune, a hollow ship said to have washed ashore on the coast of Hitachi Province (modern-day Ibaraki Prefecture) in 1803. According to accounts found in multiple Edo-period texts, including the Toen Shosetsu and Hyoryu Kishu, local fishermen discovered a round, disc-shaped vessel with a flat bottom and a dome-shaped glass or crystal top. Inside was a young woman of unusual appearance who clutched a small box and could not communicate with the fishermen.
The vessel was described as being approximately three meters wide and four meters tall, constructed of metal and wood, with strange inscriptions on its interior surface. Japanese researchers and UFO historians have noted the striking similarity between the Utsuro-bune descriptions and modern accounts of disc-shaped craft. While mainstream historians generally interpret the legend as folklore influenced by foreign castaways or cultural mythology, the detailed and consistent descriptions across multiple independent historical documents have made it a subject of enduring interest among UFO researchers worldwide.
Post-War Japanese UFO Sightings
Following World War II, Japan experienced a surge in UFO sighting reports that paralleled the global wave of flying saucer interest sparked by Kenneth Arnold's 1947 sighting in the United States. Japanese newspapers and magazines began regularly reporting sightings throughout the 1950s and 1960s, and public interest in UFOs grew substantially. Notable organizations like the Japan Flying Saucer Research Association (JFSA), founded in 1955, began systematically collecting and investigating reports from across the country.
One of the more notable post-war incidents occurred in 1974, when a teenager named Yoshihiro Fujita photographed a dome-shaped object over Hokkaido that was widely published in Japanese media. Throughout the late 20th century, UFO sightings were frequently reported near Japanese military installations and in rural mountainous areas. Japan's cultural embrace of science fiction and technology contributed to a generally open public attitude toward UFO reports, though the Japanese government maintained a largely hands-off approach to official investigation of the phenomena.
Japan Air Lines Flight 1628
On November 17, 1986, Japan Air Lines cargo flight 1628, a Boeing 747 piloted by Captain Kenju Terauchi, encountered a series of unidentified objects while flying over eastern Alaska en route from Paris to Tokyo. Captain Terauchi, a veteran pilot with over 10,000 hours of flight experience, first noticed two arrays of lights that paced the aircraft for several minutes. These were followed by the appearance of an enormous object, which Terauchi described as walnut-shaped and estimated to be the size of two aircraft carriers.
The encounter lasted approximately 50 minutes, during which the objects were confirmed on both the aircraft's radar and ground-based FAA radar at the Anchorage Air Route Traffic Control Center. The FAA conducted a thorough investigation, and Inspector John Callahan later preserved the radar data and cockpit audio recordings after FAA administrators ordered the evidence to be destroyed. Callahan went public years later, releasing the data and claiming that CIA officials had attended the FAA debriefing and instructed those present to remain silent about the encounter. The case remains one of the most well-documented airline UFO encounters in aviation history.
Modern Japanese UAP Research
In recent years, Japan has begun to take a more formal approach to unidentified aerial phenomena, influenced in part by the United States' increasing transparency on the subject. In September 2020, Japanese Defense Minister Taro Kono issued protocols for Japan's Self-Defense Forces to report and document encounters with unidentified aerial objects. This marked the first time the Japanese government formally acknowledged the need for military personnel to have standardized procedures for UAP reporting.
Japan's geographic position and dense air traffic make it a significant region for UAP observation. Japanese astronomers and citizen scientists have contributed to global UAP databases, and Japanese aerospace companies have expressed interest in studying the flight characteristics reported in UAP encounters. The convergence of Japan's deep cultural history of unusual aerial phenomena, from the Utsuro-bune to modern military protocols, positions the country as an increasingly important participant in the growing international effort to understand unidentified aerial phenomena.