I have yet to see any info on those threads that I would regard as reliable historical sources.

Most of it seems based on heresay and rumour, with a rather fortunate basis that the records are 'destroyed in the war' and the island(s) in question are unlikely to be investigated.

Personally I think the whole thing is poppycock given the fact that the leading Japanese scientist's theory on atomic weapon design was flawed from the start.

__________________
"The Americans will always do the right thing ... After they've exhausted all the alternatives."

Winston Churchill