# May 30, 1952 — nr. Oshima, Japan — C-54 Crew Encounters Round Black Object

**URL:** https://uapdiscovery.discourse.group/t/may-30-1952-nr-oshima-japan-c-54-crew-encounters-round-black-object/163
**Category:** Blue Book Unknowns
**Created:** [May 30, 2025, 1:41am UTC](https://uapdiscovery.discourse.group/t/may-30-1952-nr-oshima-japan-c-54-crew-encounters-round-black-object/163 "2025-05-30T01:41:17Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![jeffknox](https://avatars.discourse-cdn.com/v4/letter/j/e47c2d/32.png) [@jeffknox](https://uapdiscovery.discourse.group/u/jeffknox)
#### Post date: [May 30, 2025, 1:41am UTC](https://uapdiscovery.discourse.group/t/may-30-1952-nr-oshima-japan-c-54-crew-encounters-round-black-object/163/1 "2025-05-30T01:41:17Z")

</div>

![05301952-OshimaJapan-SketchByWilliamDLeet](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/1X/c0de85049b1ba776db753c984778bbd3b3ab9020.jpeg)  
 ![05301952-OshimaJapan-SketchByAndrewJRoe](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/1X/35e177abe169c9bed2e6a65ebe7a40ff1776d99c.jpeg)  
 ![05301952-OshimaJapan-SketchByRobertJArblaster](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/1X/58855a92ec681fd2103f06db70fcba279acac7d2.jpeg)

May 30, 1952 — nr. Oshima, Japan  
USAF Maj. William D. Leet, copilot on a C-54 transport mission at 8,500 feet near Oshima, Japan, sees a dark object hovering in clouds for 7 minutes. It disappears, speeding away in seconds. [Eberhart]

Blue Book Record Card:

 ![05301952-OshimaJapan-BBCard](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/1X/e59123a1717e63abd5c3e9f8f9d52092596bac27.jpeg)

Air Intelligence Report (AF-112):

 ![05301952-OshimaJapan-BB-AF112-1](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/1X/bb37802576d3868a987363fe4b8866781731632e.jpeg)  
 ![05301952-OshimaJapan-BB-AF112-2](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/1X/37705e9b2b6b0a91f6e74a6904cc35938a9de414.jpeg)

Witness Statements:

 ![05301952-OshimaJapan-BB-Statements-AndrewJRoe](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/1X/d7ae4af1b292c57383bd34fed8b6290ba6265c7d.jpeg)  
 ![05301952-OshimaJapan-BB-Statements-RobertJArblaster](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/1X/730213f132f2ec1bf5dc7537abebd8dd217b6427.jpeg)  
 ![05301952-OshimaJapan-BB-Statements-WilliamLeet](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/1X/7d492e044765575d49c1272fc6b2fb21d629c1a2.jpeg)

Sources:  
Loren E. Gross, The Fifth Horseman of the Apocalypse: UFOs, a History: 1952 January–May, Supplemental Notes, The Author, 2000, pp. 82–83;

 ![05301952-OshimaJapan-GrossSN-p82](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/1X/f24155338660bdd0895a214df69c2be2c07e833a.jpeg)  
 ![05301952-OshimaJapan-GrossSN-p83](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/1X/a7082af66ed5519d49147dd0a2c55569e9c6d90a.jpeg)

Brad Sparks, Blue Book Unknowns Catalogue, Case 600, p. 136;

 ![05301952-OshimaJapan-Sparks-Case600-p136](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/1X/8c33857e7b021b80b9748cba5f89350174d58134.png)

NICAP, “C-54 Crew Encounters Round Black Object”;

> **[UFO Report](http://www.nicap.org/520530nearjapan_dir.htm)**