The stealth thread on this forum reminded me of a document I found a few months ago. After the Japanese surrender in WW2, the Americans sent lots techical experts over to Japan to examine their technology. They produced a ton of documents reporting what they found. They're pretty interesting if you're a military technology/WW2 nerd like me.
Here's some pages of a report on Japanese stealth technology.
I just thought I'd post them in case anyone else is into this stuff. Not bad for 1945.