' 

REF ID:A65531 

2.!0li iM.iftii 

PROBLEll1 Bow can more cohesive workiDs be achieved between llIS and SSA 1n I 

' 

the evaluation and dissemination of information of Japanese ayrptanaqtic 

. or traf'tla anal;rtic i:esults. 

P.ACTS1 

1. B7 direct ... ve dated - April (?) 1945 the Deput7 Director IIS proy;t.ded tbat MIS shall be charged with the reaponaibili't7 ot evaluatlqs and d:laseld.nating inf'ormation of Japanese success in solving American crJptographic 

s1stema and in performing traf'tic anal1'sis on American communicationa. 

(work permitted to SSA) 

2. To fulfill this responsibility a unit ot Political Reports Section ot 

MIS operates under Major J. D. Spit•er1 conaiatiDg ot one otticer1 or eallsted 

woman and one civilian in addition to Major Spit•er. Thia unit aYaluates and 

disseminates 1Di'ormation, but also imlicationa of Garman operations in the Par 

East of a claDdeatine or espionage nature. 

3. The chief' source at the information ot the IIS unit is such Japanese 

,,,,;r113 messages which reach the tranaktion stage, Japanese nav1 messages which 

reach tranalation, Coast Guard translations, P/w, captured documents and studies 

of Japanese SIS actiYitiea conducted at SSA aim. other centers. 

4. To perform the tunctions of evaluation and diaa•ination to beat 

advantage, two broad bactgrounda are essent1al1 

a) The &-Branch Phase 

AD understanding ot Japanese communications and oollllllllDications 

procedures; the nature and priorit1 of intercept and intercept control, •raw• 

traf'tic aa to volu.a, points of origin and receipt as compared to relq1 

nature or the CrJptanaJ.7tic problem alld its changes, the state of solution or 

TOP SZCRB! 

Declassified and approved for release by NSA on 04-28-2014 pursuant to E.O. 

n 
REF ID:A65531 

qigp .samn 

the Yarious codes; the trattic which is decqpted compared to the traffic 

which is tramlated; an understanding or the techniques employed in perform- 1. trattio anaqsis on Japanese commun1aationa, and a knowledge of records 

and tiles •intained by the various branches participating in the Japanese 

&rlJ7 problea. 

b) The A-C Branch Phase 

.. .. 

An appreciation of the methods of devising collllllUDiaation: procedure and codes am ciphers; nature or call sign and trequenc7 allotment; nature 

of U. s. selt.lnonitoring services, 

(Barb laaa to aupplJ') 

5. The mteriala conatituti• both ale•nta of background are available 

at SSA. MIS, however, is compelled to make an &'Valuation of Japanese successes 

without having the requisite working tools regarding the Japanaae &IJIU.Ttia phase 

or of Amer:l.Can communiaationa. Unless IIS can kmw the complete ato17 from 

both aspects, misleading judgments JJJa7 be made. For example, from translated 

bulletins alone deductions lllBJ' be drawn as to the extent of Japanese intelligence 

activitiea. The true picture can be derived from reference to all the constituent elements of the Japaneae ArlQ' problem - first from raw traffic (corrected 

b7 checking the priorit7 of intercept, atmoapherica, etc.) to determine true 

Tolumaa1 then 'bJ' having precise data as to the orJPt~a position with 

reference to suoh traffic, bJ" checking the internal •ssage numbers, and b7 

having available all solved messages, whether translated or not. 
REF ID:A65531 

Anything leas cannot result in a correct piature or what 1iba 

Japanese are doing. Similarq, contiDQB&l. investigation llUBt be made in.to 

American aomunicationa practicaa whiah are the subject ot eneJQ" anaqaia. 

9. 

The need tor aouulti:ng these tJP9s ot 1Dtormat10n is contimiil.IC 

ad not sporadic. Preaenoe of the evaluator at the Agenc7 is required I 

a. it the complete and correct understanding of what the 

J'apueae are doing is to be obtained 

b. it proper dissemination leading to correct1Te measures 

is to be made. 

The divorce of the evaluating and d1aaem1Dat1Ds agenc7 trom. 1ihe 

•terial with which it deals 1a believed to be undesirable. 

6. .&.t present Captaill Mau aota aa .&.-0 Branah lla1soa ort1cer to ABS . ll&Jor Spitzer and Lt. Barasch of Japanese T/A. as representative or T/A. to 

IJ-= L • • ,. ... ~ • 1- 0 ~~ '1<-. li!iuO ~rth"', I &Q ...... -

lajor Spitzer. tJi,a A.- c.o " 11 11.-l· Oii>• - • ~ • nwww 

tL. ,,.. ~ .·• .-; ~ p,. .. ~ "' ~· ..., ..... ~ ... ~ '- 'Ir-,,, lot s 

RECOIOIERD&TIONS1 

1. Tbat lajor Spitzer'• unit be moved to i. H. to perform the directi'Ve 

ot the Depu"7 Director IIS in conjunction with 11811bers ot A., B, and C Branches, 

who will be able to furnish the aoapleta Japanese and Ameriaan aspects and aka 

suggestions reapecti.JJg the evaluation of the material baaed on workizll .,.-ienaa 

with •D8DIJ' and American conunnnications. 

2. ilternativeq, that .&. B and C Branchaa designate officers to work at 

lllS with lajar Sp1tzer1a unit.