The former Imperial Japanese Navy ensign, Takeo Yoshikawa, posing as a clerk at the consulate, encoded a brusque telegram for the Japanese foreign ministry’s home office in Tokyo. In its entirety, the message read: “Details unclear.” It was an admission of failure, and Yoshikawa’s apparent testiness is easy to understand. The 27-year-old intelligence officer had spent much of the previous evening submerged in the shallows of Oahu’s Mamala sey, attempting to study submarine barriers at the entrance to Pearl Harbor, only to come away with nothing but a deep chill.
What is known from American intelligence sources and Yoshikawa’s own recollections, to piece together a portrait of the man and his mission. The exercise is worth the effort, because Yoshikawa was indisputably effective as a spy. His activities made a direct contribution to the Japanese victory at Pearl Harbor.
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What is known from American intelligence sources and Yoshikawa’s own recollections, to piece together a portrait of the man and his mission. The exercise is worth the effort, because Yoshikawa was indisputably effective as a spy. His activities made a direct contribution to the Japanese victory at Pearl Harbor.
In plain sight: The Pearl Harbor spy
Using simple observation, a Japanese spy in Pearl Harbor collected crucial information. His full story, however, remains hidden.