From: Tokyo (Togo)
December 2, 1941
J 19-K 9
Circular #2445 Strictly secret.
Take great pains that this does not leak out.
You are to take the following measures immediately:
1. With the exception of one copy of the O and L code, you are to burn all telegraph codes (this includes the code books for communication between the three departments and the code books for Army and Navy communication).
2. As soon as you have completed this operation, wire the one word Haruna.
3. Burn all secret documents and the work sheets on this message.
4. Be especially careful not to arouse the suspicion of those on the outside. Confidential documents are all to be given the same handling.
The above is preparatory to an emergency situation and is for your information alone. Remain calm _ _ _ _ _ _ .
Also sent to Ottawa, Vancouver, Panama, Los Angeles, Honolulu, Seattle and Portland.
Army 25879 Trans. 12/8/41 (3)
(EXHIBITS OF JOINT COMMITTEE , EXHIBIT NO. 1 INTERCEPTED DIPLOMATIC MESSAGES SENT BY THE JAPANESE GOVERNMENT BETWEEN JULY l AND DECEMBER 8, 1941)