Some argue that various parties knew of the attack in advance and may even have let it happen or encouraged it in order to force America into war. Film includes issues of The Pearl Harbor advance – knowledge debate and others.
During the lead up to the attack, the commander of the Japanese task force, Vice Admiral Chuichi Nagumo, received bulletins from Vice Consul Tadashi Morimura in Hawaii. Morimura’s real name was Takeo Yoshikawa, a Japanese naval officer who had been assigned to Hawaii on espionage duty in April 1941.
Yoshikawa’s bulletins were intercepted, decrypted, and translated by the Office of Naval Intelligence, and the intercepts were also sent to Washington, but Admiral Kimmel did not receive this information. He omits mentioning that many of these were not decrypted or translated before the Japanese attack.
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