1975·Kamimachi, Kōfu, Yamanashi Prefecture

Japan.Kōfu · two boys report a landing and an occupant

On February 23, 1975, two schoolboys from Kōfu (Yamanashi, Japan), Masato Kawano and Katsuhiro Yamahata, said they saw two orange objects descend, one of which landed in a vineyard; a short occupant allegedly emerged and touched one boy on the shoulder, leaving him momentarily paralyzed. According to the Yamanashi Nichi-Nichi newspaper, their mothers saw an orange light glowing on and off for about five minutes over the vineyard, and the next morning two posts were almost down. Civil Aviation noted that airliners with naked-eye lights often pass over at that hour, which covers the aerial lights but not the landing or the occupant.

Tier B · IndicativeWhat do they mean? →

Limited evidence: a single witness, testimony gathered years later, or an account without contemporary primary documentation.

What it was

51%no known cause

The evidence is not enough to decide between the explanations

No known causeNatural or human cause
See the split across the six explanations

No known cause

Indeterminate25%
Non-human, controlled by no state24%
Non-human, hidden by a state2%

Natural or human cause

Aircraft · Airplane46%
Classified human technology2%
Adversary technology1%
Why: The period account reproduced by UFO Evidence records the official explanation: "The authorities of Civil Aviation Bureau of Transportation Ministry say that an airliner often flies over Kofu between 6:00 and 7:00 pm and that, especially, the lights of YS-11 propeller plane which flies at an altitude of thousand meters, will be visible to the naked eyes." The class covers only that layer, the orange lights in the sky; the explanation does not account for the landing, the occupant, the contact with the boy or the knocked-down posts in the vineyard. (UFO Evidence — “UFO lands and humanoid taps young schoolboy on shoulder, Kofu City, Japan” (statement by the Civil Aviation Bureau) ↗)

What happened

Around 7:00 p.m. on February 23, 1975, in the Kamimachi neighborhood of Kōfu (Yamanashi prefecture), near the Hinode housing estate, two primary-school boys, Masato Kawano and Katsuhiro Yamahata, both about seven years old, were roller-skating when they said they saw in the sky two objects glittering orange and crackling. According to their account, reported by the Yamanashi Nichi-Nichi newspaper on February 25, the bigger one flew off toward Mount Atago and the other came down between the posts of a vineyard behind the estate and landed. It was a saucer about 5 meters across and 2.5 meters high, with four large illegible letters on the hull; a side hatch opened and an occupant of about 1.3 meters came out, with no visible eyes or mouth but with three fangs, its body glowing silver and a long rifle-like object over its left shoulder, while a smaller one stayed inside.

The being walked about a meter from the craft and put a hand on Yamahata's shoulder; too scared to walk, he was carried on his friend's back some 30 meters to his house (Leonard Stringfield speaks of temporary paralysis). According to Stringfield, the occupant walked around the craft and reboarded; the newspaper does not say so.

Around the boys' account, the newspaper records other data. The mothers went back to the spot with them and saw from a distance an orange light glowing on and off over the vineyard for about five minutes, which flew away while they looked elsewhere. A classmate, Ichiro Minegishi, aged eight, said he had seen a shining object flying toward the housing estate half an hour earlier while riding in a car with his parents on the Kōfu bypass. The next morning two of the vineyard's concrete posts were found almost fallen down, which alarmed the neighbors again, and the school inspected the site with tape measures. Stringfield later wrote that there were landing traces and a ring pattern near the broken posts and that a schoolteacher found radioactivity within the circular patch; the period newspaper does not mention that measurement.

According to Stringfield, the boys were questioned in depth by investigator Masaru Mori, who translated the article into English. Albert Rosales's database, which UFO Evidence reproduces with Hayashi Ichinan and Yoshihiko Honda as its source, gives another version of some details (a disk 15 ft across and 6 ft high, a ladder, a being with dark brown skin and pointed ears who spoke words "like a taper recorder running backwards"), which the newspaper does not mention.

The newspaper adds that the sky was clear that evening and quotes the Civil Aviation Bureau of the Transport Ministry: an airliner often flies over Kōfu between 6:00 and 7:00 p.m. and, in particular, the lights of the YS-11 propeller plane, flying at a thousand meters, are visible to the naked eye. That note can account for the orange lights in the sky (and even the light the mothers saw), but not for the landing, the occupant, the effect on the boy or the posts. For those elements there is only the testimony of two seven-year-old boys, and the almost fallen posts, whose cause the newspaper does not establish. The radioactivity reading appears only in Stringfield, who does not say who took it or how; the sources consulted record no laboratory analysis of the marks and no instrumental record of the object.

Why it matters

The case combines an account of an encounter with an occupant, told by two seven-year-old boys, with data recorded by other people: according to the period newspaper, the mothers saw a light over the vineyard, a classmate saw a shining object half an hour earlier, and two concrete posts were found almost fallen the next morning. The radioactivity in the soil is cited later by Stringfield, and the newspaper does not mention it.

The central witnesses were children, and the versions of some details differ between the newspaper and Rosales's database. Apart from that radioactivity reading, which comes with no details, the sources consulted contain no instrumental record. The Civil Aviation Bureau's note on the lights of the YS-11 can account only for the aerial part.

Documents and sources

Documents

Yamanashi Nichi-Nichi Shimbun, 25 February 1975, "A UFO landed in Kofu City?", in Masaru Mori's translation

Report in the prefecture's daily two days after the sighting, translated into English by Masaru Mori and reproduced by UFO Evidence.

Read more

It says that on February 24 Yamashiro Elementary School was in an uproar because two second-graders, Masato Kawano and Katsuhiro Yamahata, both seven, said that around 7:00 p.m. on the 23rd they saw two orange objects, that one landed in the vineyard behind the Hinode housing estate and that a 1.3 m occupant touched Yamahata's shoulder. It records that the mothers saw an orange light for about five minutes, that another boy saw an object half an hour earlier, that two concrete posts were found almost fallen down, and the Civil Aviation Bureau's note on airliners and the lights of a YS-11. Copyrighted press: it is linked.

Yamanashi Nichi-Nichi Shimbun (traducción de Masaru Mori), vía UFO Evidence · view source

Documented evidence

  1. Account by two schoolboys (Masato Kawano and Katsuhiro Yamahata) of two orange objects, a vineyard landing and a short occupant on February 23, 1975 in Kōfu
  2. Partial corroboration in the period newspaper: the mothers saw an orange light glowing on and off for about five minutes over the vineyard; a classmate, Ichiro Minegishi, saw a shining object flying toward the estate half an hour earlier
  3. Two of the vineyard's concrete posts found almost fallen down the next morning; the school inspected the site with tape measures
  4. According to Leonard Stringfield, a schoolteacher found radioactivity within a circular patch; the period newspaper does not mention it
  5. Account of momentary paralysis of one boy after contact with the occupant (according to Stringfield; the newspaper says he was too scared to walk)
  6. Civil Aviation Bureau: an airliner often flies over Kōfu between 6:00 and 7:00 p.m. and a YS-11's lights are visible to the naked eye; covers the aerial part, not the landing or the occupant

Sources

  1. UFO Evidence — 'UFO lands and humanoid taps young schoolboy on shoulder, Kofu City, Japan, Feb 23, 1975' — Reproduces Masaru Mori's translation of the Yamanashi Nichi-Nichi Shimbun article of Feb 25, 1975 (primary source) and extracts from Stringfield and Rosales (secondary).
  2. Historic Mysteries — 'The Terrifying Aliens of Japan's Kōfu Incident' — Synthesis of the case and the official explanation (YS-11).

Entity form (1)

Context (not images of the event)

Contexto · Kōfu (Yamanashi, Japón), donde dos niños contaron el encuentro

Context · Kōfu (Yamanashi, Japan), where two children reported the encounter

Kofu montage.jpg · Wikimedia Commons · CC BY-SA 3.0 · open original

Related cases

Associated actors (2)