On November 2 Tōjō, Sugiyama, and Nagano reported to the Emperor that the review of eleven points had been in vain. Emperor Hirohito gave his consent to the war and then asked: "Are you going to provide justification for the war?" The decision for war against the United States was presented for approval to Hirohito by General Tōjō, Naval Minister Admiral Shigetarō Shimada, and Japanese Foreign Minister Shigenori Tōgō.
A major offensive against Moscow was renewed; after two months of fierce battles in increasingly harsh weather, the German army almost reached the outer suburbs of Moscow, where the exhausted troops were forced to suspend their offensive. The Battle took place between October 1941 and January 1942, the Soviet defensive effort frustrated Hitler's attack on Moscow, resulting ending of Operation Barbarossa.
On 18 November, the chief of the secret service reported that every possible measure was being taken. The cryptographers at Bletchley Park did not know of the Prime Minister's response, but as Milner-Barry recalled, "All that we did notice was that almost from that day the rough ways began miraculously to be made smooth." More than two hundred bombes were in operation by the end of the war.
The American counter-proposal of 26 November required that Japan evacuate all of China without conditions and conclude non-aggression pacts with all Pacific powers. That meant Japan was essentially forced to choose between abandoning its ambitions in China, or seizing the natural resources it needed in the Dutch East Indies by force; the Japanese military did not consider the former an option, and many officers considered the oil embargo an unspoken declaration of war.
On November 26, 1941, US Secretary of State Cordell Hull presented the Japanese ambassador with the Hull note, which as one of its conditions demanded the complete withdrawal of all Japanese troops from French Indochina and China. Japanese Prime Minister Tojo Hideki said to his cabinet, "This is an ultimatum".