Grew, Joseph C.
The American Ambassador to Japan in 1941 was Joseph C. Grew. He cabled Secretary of State Cordell Hull (Hull, Cordell) on 27 January to report a conversation he had had with the Peruvian envoy. This warned them that "a surprise attack on Pearl Harbor was planned by Japanese military forces in case of `trouble' between Japan and the United States; that the attack would involve the use of all the Japanese military facilities." The information was passed on to the War and Navy Departments the next day, according to Hull's memoirs. Japan's ability to carry out such a plan was discounted by the military experts of the USA.