Japanese Intelligence in World War II
Japanese Intelligence in World War II

Author: Ken Kotani

Publisher: Osprey Publishing

Published: 2009-09-22

Total Pages: 0

ISBN-13: 9781846034251

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In the eyes of history, Japanese intelligence in World War II has fared very poorly. However, these historians have most often concentrated on the later years of the war, when Japan was fighting a multi-front war against numerous opponents. In this groundbreaking new study, Japanese scholar Ken Kotani re-examines the Japanese Intelligence department, beginning with the early phase of the war. He points out that without the intelligence gathered by the Japanese Army and Navy they would have been unable to achieve their long string of victories against the forces of Russia, China, and Great Britain. Notable in these early campaigns were the successful strikes against both Singapore and Pearl Harbor. Yet as these victories expanded the sphere of Japanese control, they also made it harder for the intelligence services to gather accurate information about their growing list of adversaries. At the battle of Midway in 1942, Japanese intelligence suffered its worst mishap when the Americans broke their code and tricked the Japanese into revealing the target of their attack. It was a mistake from which they would never recover. As the military might of Japan was forced to retreat and her forces deteriorated, so too did her intelligence services.

Intelligence and the War Against Japan
Intelligence and the War Against Japan

Author: Richard J. Aldrich

Publisher: Cambridge University Press

Published: 2000-04-13

Total Pages: 536

ISBN-13: 9780521641869

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This book explores the politics of the British and American secret service during the Far Eastern War.

Special Duty
Special Duty

Author: Richard J. Samuels

Publisher: Cornell University Press

Published: 2019-10-15

Total Pages: 453

ISBN-13: 1501741608

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The prewar history of the Japanese intelligence community demonstrates how having power over much, but insight into little can have devastating consequences. Its postwar history—one of limited Japanese power despite growing insight—has also been problematic for national security. In Special Duty Richard J. Samuels dissects the fascinating history of the intelligence community in Japan. Looking at the impact of shifts in the strategic environment, technological change, and past failures, he probes the reasons why Japan has endured such a roller-coaster ride when it comes to intelligence gathering and analysis, and concludes that the ups and downs of the past century—combined with growing uncertainties in the regional security environment—have convinced Japanese leaders of the critical importance of striking balance between power and insight. Using examples of excessive hubris and debilitating bureaucratic competition before the Asia-Pacific War, the unavoidable dependence on US assets and popular sensitivity to security issues after World War II, and the tardy adoption of image-processing and cyber technologies, Samuels' bold book highlights the century-long history of Japan's struggles to develop a fully functioning and effective intelligence capability, and makes clear that Japanese leaders have begun to reinvent their nation's intelligence community.

U.S. Navy Codebreakers, Linguists, and Intelligence Officers against Japan, 1910-1941
U.S. Navy Codebreakers, Linguists, and Intelligence Officers against Japan, 1910-1941

Author: Steven E. Maffeo

Publisher: Rowman & Littlefield

Published: 2015-12-16

Total Pages: 575

ISBN-13: 1442255641

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This unique reference presents 59 biographies of people who were key to the sea services being reasonably prepared to fight the Japanese Empire when the Second World War broke out, and whose advanced work proved crucial. These intelligence pioneers invented techniques, procedures, and equipment from scratch, not only allowing the United States to hold its own in the Pacific despite the loss of most of its Fleet at Pearl Harbor, but also laying the foundation of today’s intelligence methods and agencies. One-hundred years ago, in what was clearly an unsophisticated pre-information era, naval intelligence (and foreign intelligence in general) existed in rudimentary forms almost incomprehensible to us today. Founded in 1882, the U.S. Office of Naval Intelligence (ONI)—the modern world’s “oldest continuously operating intelligence agency”—functioned for at least its first forty years with low manning, small budgets, low priority, and no prestige. The navy’s early steps into communications intelligence (COMINT), which included activities such as radio interception, radio traffic analysis, and cryptology, came with the 1916 establishment of the Code and Signals Section within the navy’s Division of Communications and with the 1924 creation of the “Research Desk” as part of the Section. Like ONI, this COMINT organization suffered from low budgets, manning, priority, and prestige. The dictionary focuses on these pioneers, many of whom went on, even after World War II, to important positions in the Navy, the State Department, the Armed Forces Security Agency, the National Security Agency, and the Central Intelligence Agency. It reveals the work and innovations of well and lesser-known individuals who created the foundations of today’s intelligence apparatus and analysis.

Combined Fleet Decoded
Combined Fleet Decoded

Author: John Prados

Publisher: US Naval Institute Press

Published: 2001

Total Pages: 0

ISBN-13: 9781557504319

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The most authoritative and revealing examination yet of the way intelligence--of all kinds--was instrumental in defeating Japan. Prados gives a new picture of the war in the Pacific, one which will challenge many previous conceptions about that conflict, and one which will be irresistible to those readers who find histories of that period fascinating. 16 pages of photos.

Japanese Foreign Intelligence and Grand Strategy
Japanese Foreign Intelligence and Grand Strategy

Author: Brad Williams

Publisher: Georgetown University Press

Published: 2021-03-01

Total Pages: 297

ISBN-13: 1647120640

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Incisive insights into the distinctive nature of Japanese foreign intelligence and grand strategy, its underlying norms, and how they have changed over time Japanese foreign intelligence is an outlier in many ways. Unlike many states, Japan does not possess a centralized foreign intelligence agency that dispatches agents abroad to engage in espionage. Japan is also notable for civilian control over key capabilities in human and signals intelligence. Japanese Foreign Intelligence and Grand Strategy probes the unique makeup of Japan's foreign intelligence institutions, practices, and capabilities across the economic, political, and military domains and shows how they have changed over time. Brad Williams begins by exploring how Japan’s experiences of the Second World War and its new role as a major US ally influenced its adoption of bilateralism, developmentalism, technonationalism, and antimilitarism as key norms. As a result, Japanese intelligence-gathering resources centered primarily around improving its position in the global economy throughout the Cold War. Williams then brings his analysis up to the Abe Era, examining how shifts in the international, regional, and domestic policy environments in the twenty-first century have caused a gradual reassessment of national security strategy under former prime minister Shinzo Abe. As Japan reevaluates its old norms in light of regional security challenges, the book concludes by detailing how the country is beginning to rethink the size, shape, and purpose of its intelligence community. Anyone interested in Japanese intelligence, security, or international relations will welcome this important contribution to our understanding of the country's intelligence capabilities and strategy.

Double-Edged Secrets
Double-Edged Secrets

Author: W.J. Holmes

Publisher: Naval Institute Press

Published: 2013-01-15

Total Pages: 256

ISBN-13: 1612512550

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In the foreword to this book, first published in 1978, Sen. Daniel Inouye describes the story as ""the raw material of adventure fiction--but this is all true and told in a manner that is at the same time fascinating and professional."" Despite the passage of twenty years and the appearance of several studies of code breaking, this inside look at naval intelligence in the Pacific is as powerful as ever. This book provides a compassionate and unique understanding of the war and the business of intelligence gathering. Assigned to the combat intelligence unit in Honolulu from June 1941 to the end of the war, W. J. Holmes shares his history-making experiences as part of an organization that collected, analyzed, and disseminated naval intelligence throughout World War II. His book not only captures the mood of the period but gives rare insight into the problems and personalities involved, allowing the reader to fully appreciate the painful moral dilemma faced daily by commanders in the Pacific once the Japanese naval codes were broken. Every time the Americans made use of the enemy messages they had decoded, they increased the probability of the Japanese realizing what had happened and changing their codes. And such a change would cause the U.S. Pacific Fleet to lose a vital edge. On the other hand, withholding the information could--and sometimes did--result in the loss of U.S. lives and ships. This revealing study illuminates the difficulties in both collecting intelligence and deciding when to use it.

Piercing the Fog
Piercing the Fog

Author: John F. Kreis

Publisher: Military Bookshop

Published: 2013-05

Total Pages: 516

ISBN-13: 9781782663812

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From the foreword: WHEN JAPAN ATTACKED PEARL HARBOR on December 7, 1941, and Germany and Italy joined Japan four days later in declaring war against the United States, intelligence essential for the Army Air Forces to conduct effective warfare in the European and Pacific theaters did not exist. Piercing the Fog tells the intriguing story of how airmen built intelligence organizations to collect and process information about the enemy and to produce and disseminate intelligence to decisionmakers and warfighters in the bloody, horrific crucible of war. Because the problems confronting and confounding air intelligence officers, planners, and operators fifty years ago still resonate, Piercing the Fog is particularly valuable for intelligence officers, planners, and operators today and for anyone concerned with acquiring and exploiting intelligence for successful air warfare. More than organizational history, this book reveals the indispensable and necessarily secret role intelligence plays in effectively waging war. It examines how World War II was a watershed period for Air Force Intelligence and for the acquisition and use of signals intelligence, photo reconnaissance intelligence, human resources intelligence, and scientific and technical intelligence. Piercing the Fog discusses the development of new sources and methods of intelligence collection; requirements for intelligence at the strategic, operational, and tactical levels of warfare; intelligence to support missions for air superiority, interdiction, strategic bombardment, and air defense; the sharing of intelligence in a coalition and joint service environment; the acquisition of intelligence to assess bomb damage on a target-by-target basis and to measure progress in achieving campaign and war objecti ves; and the ability of military leaders to understand the intentions and capabilities of the enemy and to appreciate the pressures on intelligence officers to sometimes tell commanders what they think the commanders want to hear instead of what the intelligence discloses. The complex problems associated with intelligence to support strategic bombardment in the 1940s will strike some readers as uncannily prescient to global Air Force operations in the 1990s.," Illustrated.

Pearl Harbor Revisited
Pearl Harbor Revisited

Author: Frederick D. Parker

Publisher: CreateSpace

Published: 2012-07-31

Total Pages: 104

ISBN-13: 9781478344292

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This is the story of the U.S. Navy's communications intelligence (COMINT) effort between 1924 and 1941. It races the building of a program, under the Director of Naval Communications (OP-20), which extracted both radio and traffic intelligence from foreign military, commercial, and diplomatic communications. It shows the development of a small but remarkable organization (OP-20-G) which, by 1937, could clearly see the military, political, and even the international implications of effective cryptography and successful cryptanalysis at a time when radio communications were passing from infancy to childhood and Navy war planning was restricted to tactical situations. It also illustrates an organization plagues from its inception by shortages in money, manpower, and equipment, total absence of a secure, dedicated communications system, little real support or tasking from higher command authorities, and major imbalances between collection and processing capabilities. It explains how, in 1941, as a result of these problems, compounded by the stresses and exigencies of the time, the effort misplaced its focus from Japanese Navy traffic to Japanese diplomatic messages. Had Navy cryptanalysts been ordered to concentrate on the Japanese naval messages rather than Japanese diplomatic traffic, the United States would have had a much clearer picture of the Japanese military buildup and, with the warning provided by these messages, might have avoided the disaster of Pearl Harbor.