Nakajima, FHI, Subaru

[P4RTYPAT]

Hello!
My name is Pat and I own a facebook group called Subaru mechanics and we started a podcast talking about all things Subaru. I started to go down the rabbit hole as you can see as I have ended up here lol. I have been doing some research on Nakajima, Fuji Heavy Industries, and Subaru for secret projects and rumored stories to put together a Subaru X files style series as part of the show. I am here looking for more information regarding some things I came across.

Looking for any information regarding the Project Type 11 and the Project KUROHANE: The Black Feather

From what I have found this is the information on the Type 11

• One single line in a 1954 Nikkei industry report mentions:
  “Fuji Heavy develops a new airframe for industrial observation—Type 11 prototype complete.”
  This line was scrubbed in later editions.
• A single surviving airframe — completely unmarked — was allegedly photographed in the corner of the now-defunct Utsunomiya plant in the 1980s, described as:
  • Smooth, silver fuselage
  • No tail markings
  • Stubby winglets
  • “SUBARU” in old block text barely visible on a torn vinyl covering
• Multiple defense blogs in Japan have claimed the aircraft was tested once near Lake Yamanaka in the 1960s, and was intended to be part of a civilian-industrial surveillance fleet—a Japanese DARPA equivalent.
• The Japanese Defense Technical Research headquarters was located less than 40 minutes from Subaru’s Gunma plant.

And this is the information on black feather

Long before Subaru was even a carmaker — in the late 1944–1945 closing months of WWII — Nakajima Aircraft Company allegedly began an experimental escape project, commissioned not by the Japanese military command, but by internal engineers fearing Japan’s defeat and preparing to preserve their own aerospace advancements.

This project was allegedly code-named:

“KUROHANE” (黒羽) — The Black Feather.

It was never meant to fight.
It was meant to flee.
According to two obscure postwar oral histories:

• It was a single-seat, long-range glider aircraft, constructed in secrecy using composite wood-aluminum laminate materials
• Designed to be launched from a rail and possibly catapulted from a coastal mountain ridge
• Powered not by an engine — but by experimental jet assist pods under the fuselage
• Meant to carry a single civilian pilot and critical documents, film reels, blueprints, or scientific artifacts

Its intended purpose:

Escape Japan with classified Nakajima engineering and preserve it for future aerospace reconstruction — possibly in neutral territory like the USSR-aligned Kuril Islands or occupied China

• A 1946 U.S. Intelligence Field Report, declassified in 2005, includes a line:
  “Rumors persist of one Nakajima prototype airframe unaccounted for after Surrender — believed to be wood-skinned, single-wing design, last seen in northern Gunma.”
• A 1953 Fuji Heavy engineer memoir — out of print and uncatalogued — includes the sentence:
  “One wing from the Black Feather was used as a measuring surface in our early wind tunnel mockups.”
• In 1989, a collapsed wooden structure in the mountains above Ota revealed what appeared to be airframe spars, burned and covered in soot — never claimed by any aviation group.
• The phrase “Kurohane no tame ni” (“for the Black Feather”) was found carved into a wooden beam at the rear of an old Nakajima machine bay, later renovated into a break room by Fuji Heavy.

Any information on either of these would be amazing or if you know of any secret projects by any of these companies please comment them! Podcast is called The wave by subaru mechanics for anyone interested.