[139]       COMMUNICATION INTELLIGENCE SUMMARY, 3 November 1941
 
General.-Traffic volume slightly under normal although fair for Monday.  Receiving conditions good but all circuits slow. General messages  continue to emanate from TOKYO communications. Such an amount is  unprecedented and the import is not understood. A mere call change does  not account for activities of this nature. The impression is strong that  these messages are periodic reports to the Major Commander of a certain  nature. Dummy traffic is again being sent in the TOKYO broadcasts. Naval  Intelligence TOKYO addressed two WIWI messages to Chief of Staff  Combined Fleet and to KUMI 8 (unidentified).
Combined Fleet.-Commander in Chief Combined Fleet sent an urgent message  to BUMIL information all Major Commanders, Combined Fleet, Naval  Intelligence Tokyo,  the Chief of Naval General Staff, and Bureau of  Personnel. Commander in Chief, Combined Fleet also was associated in  traffic with offices in the mandates. principally RNO PALAO. The  Commander in Chief, Combined continues to be associated with the  Carriers and Submarines.
Third Fleet.-Third Fleet traffic continues at a high level. A movement  report by RATI 66 (unidentified) was addressed to Commander in Chief  Third fleet for information.
Air.-A WE address today broke down as "ITIKOUKUU KANTAI". The literal  reading of this as "1st Air Fleet" is correct it indicates an entirely  new organization of the Naval Air Forces. There are other points which  indicate that this may be the case. An old call (YOME7) while never  identified seemed to be in a high position with respect to the Carriers  and the Air Corps. Upon movement of air units to TAIWAN the association  of CarDiv 4 and CarDiv 3 with units of the Combined Air Force was  apparent. Their association in a command sense between shore based air  and fleet air had never occurred before but under the concept of an AIR  FLEET can easily be accepted. Traffic in the Air Force continues at a  high level.

 

(FROM: U.S. CONGRESS JOINT COMMITTEE ON PEARL HARBOR ATTACK HEARINGS; PT.  35, THE CLAUSEN INVESTIGATION, PP. 62-81. EXHIBIT "A" DAILY COMMUNICATION INTELLIGENCE SUMMARIES)