Research sheds light on Japan’s wartime espionage network inside the United States
September 26, 2022 1 Comment
MUCH HAS BEEN WRITTEN about the wartime intelligence exploits of the Allies against Japan. Such exploits range from the United States’ success in breaking the Japanese JN-25 naval code, to the extensive operations of the Soviet Union’s military intelligence networks in Tokyo. In contrast, very little is known about Japan’s intelligence performance against the Allies in the interwar years, as well as after 1941. Now a new paper by an international team or researchers sheds light on this little-studied aspect of intelligence history.
The researchers, Ron Drabkin, visiting scholar at the University of Notre Dame, K. Kusunoki, of the Japan Maritime Self-Defence Force, and Bradley W. Hart, associate professor at California State University, Fresno, published their work on September 22 in the peer-reviewed journal Intelligence and National Security. Their well-written article is entitled “Agents, 
Attachés, and Intelligence Failures: The Imperial Japanese Navy’s Efforts to Establish Espionage Networks in the United States Before Pearl Harbor”.
The authors acknowledge that the history of the intelligence efforts of the Imperial Japanese Navy (IJN) has received very little attention by scholars. Consequently, it remains unexplored even in Japan, let alone in the international scholarship on intelligence. There are two main reasons for that. To begin with, the IJN systematically destroyed its intelligence files in the months leading to Japan’s official surrender in 1945. Then, following the war, fearing being implicated in war crimes trials, few of its undercover operatives voluntarily revealed their prior involvement in intelligence work.
Luckily, however, the past decade has seen the declassification of a number of Federal Bureau of Investigation (FBI) counterintelligence files relating to Japanese intelligence operations targeting the United States. Most of these files date from the 1930s and early 1940s. Additionally, a number of related documents have been declassified by the government of Mexico, which is important, given that Mexico was a major base for Japanese intelligence operations targeting the United States. Read more of this post
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