Dossier reconstruction of the lens-shaped object photographed over Chiba Prefecture, Japan, May 11, 1975.
THINK ABOUTIT UFO|UAP ENCOUNTER REPORT
1975: Chiba, Japan UFO Photo | Falling-Leaf Descent Case Archive
At 9:00 AM on May 11, 1975, a young witness named Ryutaro Umehara photographed a dark, featureless, lens-shaped object over Chiba Prefecture, Japan, capturing four color frames as it descended in what he described as a “falling-leaf” pattern — drifting down with the same side-to-side flutter as a leaf falling from a tree. The photographs have since found their way into more than one “classic UFO photographs” compilation, where at least one account describes the object in richer detail: domed, metallic-looking, with a glowing underside, holding still for a moment before departing silently.
That fuller description comes from a separate source than this page’s own primary summary, so it’s presented here with its origin clearly marked rather than folded in as settled fact. So is the classification: the original CE-II label doesn’t fit a case with no physical trace or effect evidence of any kind — this was a photographed daytime object, nothing more, and this entry corrects it to a Daylight Disc.
Date: May 11, 1975
Sighting Time: 9:00 AM
Day/Night: Day
Location: Chiba Prefecture, Japan
Urban or Rural: Rural
Hynek Classification: DD (Daylight Disc) — corrected from CE-II. No physical trace, medical, or electrical/heat effect is described anywhere in the material available for this case; this was a photographed daytime object with no reported close-range interaction. See Researcher’s Notes.
Duration: Undocumented precisely; witness photographed the object across multiple frames as it descended, reportedly pausing briefly before departing
No. of Object(s): 1
Description of the Object(s): A dark, featureless, lens-shaped object descending in a “falling-leaf” pattern; a secondary source describes it as domed and metallic-looking, with a glowing underside, remaining stationary briefly before moving off silently. See Researcher’s Notes.
Shape of Object(s): Lens-shaped
Size of Object(s): Undocumented
Color of Object(s): Dark/featureless, per the original summary; a secondary source additionally describes a glowing underside
Distance to Object(s): Undocumented
Number of Witnesses: 1 (Ryutaro Umehara)
Special Features/Characteristics: Witness captured four color photographs of the object as it descended; a secondary compilation of “classic” UFO photographs describes the object remaining stationary briefly before departing silently, with no trail or sound, and notes an unresolved skeptical hypothesis that the images may depict a small hoax model, while also stating no clear evidence of fakery has been established
Case Status: Insufficient Data
Source: Undocumented specific original publication; the case is independently catalogued among “classic” 1970s Asian UFO photographs, including in ufoevidence.org’s regional photo archive
Summary/Description: At 9:00 AM on May 11, 1975, a witness named Ryutaro Umehara photographed a dark, featureless, lens-shaped object over Chiba Prefecture, Japan, capturing four color frames as it descended in a fluttering, “falling-leaf” pattern. The resulting photographs have since appeared in multiple compilations of classic UFO images, with at least one describing the object in greater visual detail and noting an unresolved hoax hypothesis.
Related Cases: Listed alongside this archive’s own Hokkaido (November 1974) and Bali Island (1973) entries in at least one independent regional UFO photo archive. Not otherwise connected beyond appearing in the same photo compilation.
Detailed Report
The primary record for this case is brief: at 9:00 AM on May 11, 1975, a young witness named Ryutaro Umehara, in Chiba Prefecture, Japan, photographed a dark, featureless, lens-shaped object as it descended through the sky, fluttering side to side in what he described as a “falling-leaf” pattern. He captured four color photographs of the object during this descent.
The resulting images have circulated since in various compilations of notable historical UFO photographs, appearing, for instance, in ufoevidence.org’s regional photo archive alongside other Asian cases from the same era, including this archive’s own Hokkaido (1974) and Bali Island (1973) entries. At least one modern compilation of “classic” UFO photographs offers a considerably fuller description of the object than survives in this page’s own primary summary: a domed, almost metallic shape with a glowing underside, said to have remained stationary for several moments before moving off silently, without leaving any trail or sound. That same source notes that some skeptics have proposed the photographs show a small hoax model, while also stating that no clear evidence of fakery has ever been established.
RESEARCHER’S NOTES
The Chiba Photograph — Japan 1975 and a Classification With Nothing Behind It
- Classification Correction: CE-II specifically requires documented physical, medical, or electrical/heat effects. Nothing of this kind is described anywhere in the material available for this case — no witness effect, no trace, only a photographed daytime object. This entry reclassifies the case as DD (Daylight Disc).
- A Richer Description, Cautiously Added: Bret’s own summary describes the object only as a “featureless dark lens-shaped object.” At least one independent modern compilation of “classic” UFO photographs describes the same case’s images in considerably more detail — a domed, metallic-looking shape with a glowing underside, remaining stationary before departing silently. This entry includes that description but attributes it clearly to that separate source rather than treating it as confirmed by this page’s own primary summary.
- An Unresolved Hoax Hypothesis: The same secondary source notes that some skeptics have proposed the photographs depict a small hoax model, while also stating that no clear evidence of fakery has ever been established. This entry preserves that unresolved tension rather than favoring either the hoax hypothesis or the case’s authenticity.
- Part of a Recognized Photo Series: This case is listed among “classic” 1970s Asian UFO photographs in independent archives, alongside other cases from the same era and region — suggesting it has some standing recognition in ufology photo collections, distinct from any confirmation of what the photographs actually show.
- Evidentiary Weight: The case rests on a single witness and a set of photographs whose authenticity has been publicly questioned without resolution; no independent technical analysis is documented in the material available to this archive.
The Chiba photographs have earned a modest, lasting place in UFO photo compilations, but that recognition doesn’t amount to verification — a single witness, an unresolved hoax hypothesis, and no analysis this archive could independently confirm. Reclassified to match what’s actually documented and filed as Insufficient Data, this entry treats the case’s visual notoriety and its evidentiary weight as two separate things.
“Descended in a falling-leaf fashion.”
