1948/2/2; 06.00: Light snow, then rain / The second floor of Mejiro Police Station / Special Investigation HQ / Meeting of the Special Investigation Team / Chief of Police Kita present / New clue: cheque number B09216 for ¥17,450, listed as missing presumed stolen from the Shiinamachi branch of the Teikoku Bank on 26 January during the mass poisoning, was cashed at approximately 14.30 on 27 January at the Itabashi branch of the Yasuda Bank / Cheque endorsed by Gotō Toyoji, 2661 Itabashi 3-chōme, Itabashi-ku / Yasuda branch manager discovered cheque matched that listed missing or stolen during the Teigin incident yesterday / Notified police / Statements taken by detectives / Descriptions by bank staff of man who cashed the cheque do not match descriptions given by survivors of the Teigin incident / Man at Itabashi branch of Yasuda Bank described as being heavyset, wearing spectacles with tortoise-shell frame, and speaking coarsely / Officers sent to address written on back of cheque / No one named Gotō Toyoji lives at this address / Occupants have no knowledge of anyone of that name.
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1948/2/4; 06.00: Cold, rain / The second floor of Mejiro Police Station / Special Investigation HQ / Meeting of the Special Investigation Team / Chief of Police Kita present / Composite drawing of suspect based on eye-witness description of suspect by Teigin survivors distributed to all detectives, all police stations and all newspapers nationwide / First time composite drawing of a suspect has been used in history of Japanese police / Anticipate large public response / Drawing to be used by all ji-dōri questioning teams / Ordered to re-interview households and individuals already interviewed, this time with composite drawing / Note to all detectives and police officers: Poison used in the murders now believed to be cyanic silver NOT potassium cyanide / Murderer believed therefore to be highly experienced in handling and use of drugs / 07.00: Resume ji-dōri questioning with composite drawing / Same neighbourhoods, same streets, same houses, same doors, same faces, same waste of time.
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The Second Period (the second twenty days of the investigation; 15 February to 5 March, 1948) —
1948/2/15; 06.00: Cloudy, then overcast / The second floor of Mejiro Police Station / Special Investigation HQ / Meeting of the Special Investigation Team / Chief of Police Kita present / Overview of Investigation to date / Over 500 suspects questioned / Innumerable leads followed up / All suspects eliminated and released / All leads investigated and exhausted / Back to ji-dōri / Back to meetings / Endless ji-dōri, endless meetings / Endless wastes of time / Endlessly taking us nowhere.
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1948/2/23; 18.00: Cold / Meeting of entire First Investigative Division at Special Investigation HQ / SCAP-Justice Ministry Liaison Officer Miyakawa reports on results of meeting with Public Safety Division of Supreme Commander for the Allied Powers on 19 February 1948 / On behalf of the Investigation, Miyakawa requested the assistance of the SCAP Public Safety Division in locating a Lieutenant Hornet and a Lieutenant Parker / Both names associated with typhus disinfecting teams in the Tokyo area / Lieutenant Hornet believed to have been associated with the Toshima team in the Ōji and Katsushika Wards / Lieutenant Parker associated with the Ebara disinfecting team / Witnesses at the Ebara branch of the Yasuda Bank reported suspect as saying, ‘I came here with Lieutenant Parker in a jeep because a new typhus case happened in the vicinity.’ / At the Shiinamachi branch of the Teikoku Bank, the same individual is reported as saying, ‘I came here because there have been many dysentery cases in the area. Lieutenant Hornet will be here soon.’ / Miyakawa requested that the Public Safety Division of SCAP provide any information, names and addresses of Japanese individuals either connected with or having knowledge of the disinfecting work done by either of the above lieutenants, particularly interpreters or individuals who speak English / Miyakawa advised elimination of individuals below the age of thirty or above the age of sixty / Mr Eaton of the Public Safety Division informed Miyakawa that, having spoken with Mr Allen of the Tokyo MG Team Sanitation Control, ten low-ranking medical officers were used by the MG Team in typhus epidemic control activities in 1946 / However, at present, there are no military personnel employed by the MG Team in such work / All disinfecting work is now carried out by Japanese employees of the Tokyo Ward Offices / Furthermore, no such teams are employed by the Public Health & Welfare Department / Mr Eaton stated that some SCAP personnel are presently used in rodent control under HQ and Service Group, Repair and Utilities Division, but none by the name of Parker or Hornet / Finally, Mr Eaton stated that he would contact the AG Section of GHQ to ascertain the names and whereabouts of any lieutenants or captains by the name of Parker or Hornet who have been assigned to Japan / Meeting ends / Back to ji-dōri / Back to meetings / Ji-dōri and meetings / Endless, endless ji-dōri and endless, endless meetings / Endless, endless wastes of time / Endlessly, endlessly taking us nowhere.
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1948/3/4; 18.00: Meeting of entire First Investigative Division at Special Investigation HQ / Police Chief Kita has requested that the Public Safety Division of SCAP assist in securing any information available pertaining to a group of former Japanese military personnel who were sent to Korea as poisoners during the war / It is believed that these persons were highly trained in preparation of various poisons / It is also believed that SCAP is investigating these persons for possible war crimes / Meeting ends / Nothing now but more ji-dōri, more meetings / More ji-dōri, more meetings / More, more ji-dōri, and more, more meetings / More, more wastes of time / More, more, taking us nowhere.
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The Third Period (the third twenty days of the investigation; 6 March to 25 March, 1948) —
1948/3/6; 06.00: Strong northeasterly winds / Meeting of entire First Investigative Division at Special Investigation HQ / Police Chief Kita gives overview of investigation to date and outlines direction of investigation for Third Period / Focus to be on new lead checking ex-personnel of the former Japanese Imperial Chemical Laboratory in Tsudanuma, Chiba-ken / Known that experiments were conducted with prussic acid as a poison / Corps sent to Manchuria during the war / Corps used poison on animals and humans successfully / Pamphlet on use of poison issued to Japanese army personnel / Modus operandi and use of prussic poison by the criminal very similar to the training developed by Tsudanuma Arsenal / Language used by the criminal indicative of training by this laboratory / Further evidence: use of ‘First Drug’ and ‘Second Drug’ in English; ability to drink from the same bottle as victims in knowledge that poison had been precipitated at bottom of solution; knowledge of precipitation of prussic acid using oil from palm trees / Furthermore, equipment used matches description of equipment used in Tsudanuma laboratory / Note: at end of war and closure of laboratory, employees took equipment home / Personnel information on former employees now been given by former Major Nonoyama and former Colonel Yokoyama / Request that all information be kept secret for fear of prosecution by War Crimes Tribunal / Police Chief Kita concludes meeting with statement that complaint about behaviour of press will be lodged with SCAP / Cheers / Meeting ends / 08.00: Meeting of Room #2 for re-assignment / Retained with Fukushi on ji-dōri team / Argument with Suzuki (Head of the First Division) / Questioning is ineffective / Leading nowhere / Three crime scenes — Ebara, Nakai and Shiinamachi — not helping / Suggest only follow hard evidence of Matsui and Yamaguchi name-cards / Track the cards, find the killer / Rebuked for insubordination / Transferred and demoted to Robbery Room with Fukushi / 09.00: Report for reassignment to Robbery Room / Small rented room next to Investigation HQ in Mejiro / Now under Inspector Iki-i / Eight men; four on Matsui, four on Yamaguchi / Assigned to Matsui card with Fukushi / All reports direct to Iki-i / Iki-i reports directly to Police Chief Kita / No information to be given to First Investigative Division (for fear of leaks to press) / Told to read through Robbery Room name-card files and notes to date / 09.30: Begin with Detective Tomitsuka’s report on interviews with Matsui and information and statements gathered in Sendai / Card one of 100 printed in the basement of Miyagi Prefectural Office on 25 March 1947 / Dr Matsui had exchanged 128 cards in total / Each person located, interviewed, asked to produce card received from Matsui / Persons unable to produce Matsui card allocated file / Told to work through each file / Re-check each file and mark for possible re-interview / Begin to re-check, re-check, re-check / No regrets.