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The Outlook

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Chapter Summary

The most interesting thing that has happened in historical accounts of the role played by the Japanese intelligence system, before and during the Second World War, is that the historical image has been stood on its head. Japanese historians have recently assessed the massive Allied knowledge of Japanese planning at all levels made possible by the breaking of diplomatic naval codes. Internal security in Japan was the province of the police, either under the prefectural government or, in the case of Tokyo, the Metropolitan Police Office. Responsibility for internal security lay with the Kempei. Signals intelligence, which has become a dominant theme in western military history since the revelations about ULTRA in 1974 released a tidal wave of reminiscence and analysis, has not played the same role in the understanding of Japanese planning and campaigns, largely because the evidence has been so sparse on the Japanese side.

Keywords:Japan; Japanese intelligence system; Kempei; Signals intelligence



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