4.7. What the Japanese Said about the Winds Execute Message
Based on the FCC and naval intercept, it is clear that the Japanese broadcast the Winds Execute message, specifically "West Wind Clear," on 7 December (8 December Tokyo time) 1941. Japanese sources, though, contradict one another as to what time that day they actually broadcast the phrase and what coded phrases were sent out over the airwaves. However, it is certain from the evidence that the message was sent only on that day and possibly into the next, considering the time zone difference.
After the war, military investigators for the Advance Headquarters, U.S. Army Forces Pacific, Tokyo, searched the extant records of the Japanese Broadcast Corporation and interviewed its employees ...
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