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SIGNAL SECURITY AGENCY 

WASHINGTON 25, D. C. 

SPSIS-3 3 May 1945 

SUBilECT: Message 8007. 

TO: Commanding Officer 

Signal Security Agency 

1. In re the attached radiogram from Colonel Colline: 

a. The _bulletin message in question here is SIS 

No. 2706.5, a copy of which is attach..-d, exactly as it appeared in the bulletin. (Inclosure 1) 

b. In reviewing the Pearl Harbor file, when I 

came across SIS No.27063 I felt then that we might be 

called upon for some explanation of the delay 1n process- ing this message. When I tried to find the intercept and 

work sheets in our files, nothing could be found. I then 

discussed the matter with you and suggested that we ask 

OP-20-G to look in their files. I prepared and you signed the request to Navy. In response to your request we received 

(Inclosure 2) the following items: 

(1) 

(2) 

(3) 

Photostat copy of original Mackay radiogram from Tokyo to Honolulu, dated 0707, 

2 Dec 1941. · 

Photostat copy or intercepted message as 

it appears on log sheet 014037 of Station 

5. The log sheet is dated 11 Dec 41, but 

the date or the intercepted message is 

given as 2 Dec 41. 

Photostat copy or solution work sheet for 

SIS No. 27065, bearing the date 30 Dec as 

the date or solution. 

c. The following deductions are aade: 

(1) 

(2) 

The Tokyo-Honolulu message was intercepted 

by Station 5 at 0707 on 2 Dec 41 • 

It was not prepared for forwarding to. 

Washington until 11 Dec 41. Presumably the 

log sheet was m&iled on ll Dec 41. 

l~P · ~~~ftllH lllnu ~ll 

Declassified and approved for release by NSA on 11-07-2013 pursuant to E .0. 1352a 
~ 

• 

3pSIS-3 (3 May 1945) 

(3) The log sheet was received by SIS on 

23 Dec 41. 

(4) The message was processed on 30 Dec 41. 

(5) The photostat or the Macka.y radiogram 

came some time after 23 Dec 41, as it 

bears the word "dupe" on its race. Note 

the decoded reference number, dater., and 

indicator HAHVK meaning "J-19", inked in 

by somebody who recognized that it was a 

duplicate. 

d. At one time, in discussing this intercept with 

Captain Safford, he stated that he had a dim recollection 

that this message had been intercepted by their West Coast 

Station on 2 Dec 41, forwarded by teletype, and logged out 

to SIS on the same day; further, that it was possible that 

this copy was garbled, which might explain failure to make 

a prompt translation. Captain Safford was not in a position 

to verify this, saying that OP-20-G had told him that by direction or Admiral Redman they could not give hi• any information. We have not asked OP-20-G to indicate whether 

their records will substantiate Captain Safford's recollection. It might be advisable to do so, in view or the current 

interest in this intercept. 

e. Our records here have been carefully searched 

and we are unable to locate data which will give the complete assigned intercept Jllission or Station 5 between 1 Dec 

and 30 Dec 1941. The only things we have been able to locate 

are attached in Inclosure 3. 

t. Colonel Hayes says that since the information 

requested by Colonel Collins is on behalf ot Colonel Clausen, 

it is all right to furnish it. 

!J. Incls 

SIS Msg No. 2~0~5. 

Original intercept and work sheet for 

SSA Message 

9iJ~ WILLIAM F. FRIEDMAN 

Director of 

co .. unications Research 

Radiograms from SIS to 

HAwaiian Dept, Philippine 

Dept., sgnd by Col. 

Minckler. 

Radiograms 292 & 304 rroa2 'L.!U~U-- rt~.:!f-ffl"S-tl­ Col. Collins. (CM-IN 2908Q 

and 30283) 
• 

From: Tokyo (Togo) 

To: Honolulu 

December 2, 1941 

J-19 

#123 

REF ID:A488659 

·aEOIPdtb a 

(Secret outside the department.) 

In view of the present situation, ta. presence in port of 

warships, airplane carriers, and cruisers is of utmost illportance. 

HerElafter, to the utmost of your ability, let me know day by day. Wire 

me in each case whethe;r or not there are any observation balloons above 

Pearl Harbor or if there, are any indications that they will be sent up. 

Also advise me whether or not the warships are provided with anti-mine 

nets. 

Note: This message was received here on December 23. 

ARMY 27065 

JD 8007 (Japanese) Trans. 12/J0/41 (5) 

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MESSAGE CENTER 

INCOMING MESSAGE 

FROM: US ARMY FORCES IN PACIFIC OCEAN AREAS FORT SHAFTER TH 

TO: SIGNAL SECURITY AGENCY 

MSG NR: SID 380 150045Z MAY 45 

CORDERMAN FOR ROWLETT FROM FRAME 

INTERCEPTED CODE TEXT DESIRED HERE OF MESSAGE YOUR 

TRANSLATION 12 DECEMBER 41 NUMBER ARMY 8007-27065 BULLETIN 

ARNO 

AS CM-IN NR: 37944 
REF ID:A488659 

• Op-20-G-5/efr 16 March 1945 

!O~ BE6ltf!:'i' ~L'f'ft:A: 

TOP s~s-:T-ULTRA 

MEMORANDUM FOR COLONEL CORDERMAN. 

Subj: Original Intercept and work sheets for SSA message 27065. 

Ref (a) Your Top Secret Memo dated 12 March 1945. 

Enc (A) 3 Photostats. ,, ) c ~! 

1. Photostats of subject documents are forwarded herewith as 

enclosure (A). 

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REF ID:A488659 

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