There was a message decoded and passed on to upper level Naval officers. The message went unnoticed or ignored. There was another message from an American Ship letting headquarters know they had to use missiles on miniature Japanese subs prior to the air attack. So someone at the headquarters knew but did not believe it. Once the attack started many people were confused it was a drill until they went outside to see it was the Japanese. So the Japanese caught the American Navy with their pants down.
It was not morally justified for Japan to attack Pearl Harbor. Elements of the Japanese Imperial High Command believed that conflict with the United States was inevitable and that a "first strike" would knock the Americans out of the war. The Japanese had hoped to catch the three American carriers at anchor in Pearl Harbor, but failed. While the Japanese seriously damaged the American fleet, it failed to land a lethal blow. The American carrier-fleet helped to stop the Japs at Coral Sea and then at Midway a few months later. The Battle of Midway began the reversal of Japan's fortune in the Pacific.
The japanese refusal to withdraw from China.
The devastation of Pearl Harbor can be attributed to both American unpreparedness and superior Japanese planning. The U.S. military underestimated the possibility of an air attack on the base and failed to adequately prepare its defenses, despite receiving intelligence indicating potential threats. Conversely, the Japanese executed a meticulously planned and coordinated attack that capitalized on these vulnerabilities, demonstrating their tactical superiority. Ultimately, it was a combination of these factors that led to the attack's devastating impact.
Pearl Harbor is how we usually refer to the Japanese surprise attack on US military installations in Hawaii (Pearl Harbor) and elsewhere in the Pacific on 7-8 December 1941. This is the action that brought the US into World War 2. Because of poor coordination within the Japanese Foreign ministry, the Japanese failed to issue a declaration of war just before the attack failed. The declaration was issued after the attack. Thus the attack was considered a sneak attack and "cowardly" and enraged the US populace. also how japan owned America
While it was an initial success, it was a failure. The Japanese failed to sink or damage any of the US Aircraft Carriers. They woke a sleeping dragon that ended up swallowing them.
Japan was unable to sink any of the three US Aircraft Carriers, as they were out of the operation zone, at training (one was pursued by a submarine, but managed to sink the sub); Lexington, Enterprise, and Saratoga. If these were to be too vigorously pursued, the Japanese planes might have failed to continue damage on the harbour.
An effort was made to block Santiago de Cuba's channel with the Collier Merrimac but it failed.
The Japanese failed to destroy any of the aircraft carriers. While many of the smaller ships were destroyed, only one battleship was eliminated. The USS Arizona remains at the bottom of the harbor.
The Japanese-Americans living and working on Oahu Island (where Pearl Harbor and Honolulu are located) had nothing to do with the attack on Pearl Harbor. Japanese Naval Pilots were the ones who perpetrated the attack.
Certainly the Japanese Naval leaders believed they could cripple the US Naval fleet but they messed up when they failed to bomb the aircraft carriers in Pearl Harbor. They also did not realize the Americans had other ships elsewhere and could also rebuild or build new ships. The Japanese thought Americans were wusses and dopes. They did not understand their enemy.
American attacks consistently failed in Canada
During the attack on Pearl Harbor 29 of 360 Japanese planes were shot down. Only a few US planes made it in the air, so most Japanese planes were shot down by the sailors on the vessels in the harbor. The Japanese lost nine aircraft in the first attack wave and twenty in the second.