"Peter H." wrote in message
...


They explained how they broke the Japanese code.


The JN25 code was cracked by the Americans, at Pearl Harbor.

Perhaps a much lower level code, the Japanese Merchant's Code was cracked
at
B.P.


I was always taught at school that the Brits had cracked the Japanese codes
in 1940 and had warned the US that they were to be attacked in 1941. The
warnings were ignored by Roosevelt's intelligence advisers as part of
Churchill's campaign to get the USA to join the war against the German Axis.