Japan Broke U.S. and British Diplomatic Codes Before Pearl Harbor

[Ben Meghreblian]

December 7, 2001

http://www.latimes.com/news/nationworld/world/la-120701codes.story

TOKYO -- Toshihiro Minohara made a startling discovery while digging 
through the U.S. National Archives in College Park, Md., last summer. While 
researching secret codes used prior to the attack on Pearl Harbor 60 years 
ago, the young Japanese American professor stumbled upon a document, 
declassified by the CIA about five years ago, that proved that Tokyo had 
succeeded in breaking the U.S. and British diplomatic codes. A few 
microfilmed documents, showing the Japanese translations of the telegrams, 
were attached.

[snip]

Cheers,

Ben



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