3 December 1941
Please keep the code list (INGO HIKAE)* (including those in connection with broadcasts) until the last moment, and if by any chance you have already destroyed them they will have to be resent to you, so please notify us of this fact immediately.
This message is as a precaution.
JD-1: 7123 (Y) Navy Trans. 12-6-41 (S-TT)
*"Hidden Word" code to be used in plain Japanese language messages.
(EXHIBITS OF JOINT COMMITTEE , EXHIBIT NO. 1 INTERCEPTED DIPLOMATIC MESSAGES SENT BY THE JAPANESE GOVERNMENT BETWEEN JULY l AND DECEMBER 8, 1941)