[Boundless]

>> Japan also had an atomic bomb project. As did Germany.

And Japan set off “something” a few days after Nagasaki,
on an island off what is now North Korea. We probably
won’t know fer shure until PRK collapses, and the area
can be tested for residuals.

> But... but... we went into those places and didn’t find any WMDs!

Don’t be too sure. We wrecked a lot of Japanese nuke
stuff when the occupation began. Not sure all of it
was reported to the public.

[RightWhale]

Japan’s nuke project was located in what is now N Kor. They would have tested nearby if they tested. Present N Kor was the industrial heart of Korea.

[Cheburashka]

Don’t be too sure. We wrecked a lot of Japanese nuke stuff when the occupation began. Not sure all of it was reported to the public.
---
The big Japanese site I know of was in what is now North Korea. Which was occupied by the Soviets in August 1945.

The site, the scientists, the technicians all disappeared into the maw of the NKVD and never returned.