Why and how did japanese attack pearl habour in world war two?

Question

i understand, from 1 of the website that at that time, japanese have alrdy taken over some of the countries and british was its largest enemy as it is sort of the only one that have the force to attack it.there were some japanese sent over to the british and british also made the invention of 'magic' to decode the messages.the british decoded that the japan would attack in the morning but as the machine in hawaii is spoiled, the message is delivered 4 hours after the pearl habour have been attacked.i do not know if the information stated by the website, above is correct.

Answer 1

The arguments for a surprise attack on the American fleet were strong ones, for basically there was a disparity in numbers of modern battleships between the United States and the Japanese Navies. To Admiral Yamamoto a reduction in American strength was essential to put the two surface fleets on an equal footing. The clinching argument was for the need to keep the war short, thus preventing the United States from mobilizing her industrial might.

Nor had the successful British attack by torpedo bombers on the Italian fleet in Taranto harbour gone unnoticed to the Japanese planners. In fact it put the finishing touches to the long maturing plans for dealing with the American Pacific Fleet.

As everyone now knows the attack on the United States Fleet based at Pearl Harbor on the 7th of December 1941 was a devastating success. Ninety Japanese Carrier-Bornne 'Kate' bombers of the first wave caught the Americans completely by surprise, and the US Battleships were rapidly put out of action. The USS Arizona blew up, the Oklahoma capsized, and the California and West Virginia sunk in shallow water. The USS Nevada, Maryland, Tennessee and Pennsylvania were all damaged to a greater or lesser degree.

A second strike by eighty-one Aichi Dive-bombers fell on the nearby airstrips destroying numerous aircraft on the ground and causing a considerable number of casualties. A third air strike might have inflicted further damage on the ships and instalations but the Japanese commander, Vice Admiral Nagumo, was satisfied with the damage already caused to the American Base and decided to cancel the planned third strike. The Japanese had lost just twenty-nine aircraft.

Without a Battleship fleet the Americans would, for the time being, be forced to rely on their aircraft carriers for any operations against the Japanese Navy. An arm in which numerically the Japanese held the advantage.

The idea of utilising the Aircraft Carrier as the basis for offensive action was one that had been considered by the US Navy but had never been implemented as an official doctrine. It is to their credit that, within a few months, the US Navy had learnt the new form of warfare and had suceeded in turning it against their treacherous enemy.

Answer 2

WHY:
Pearl Harbor attack planning was a part of the Japanese expectation the U.S. would be inevitably drawn into the war after a Japanese attack against Malaya and Singapore.

HOW:

The task force was ordered (Order Number 7) to engage the enemy fleet if encountered. A commercial freighter had scouted the proposed route earlier in the year. Yamamoto and senior Navy staff intended there be three waves of attack, but Vice Admiral Chuichi Nagumo decided to break off after the second. There were also supporting submarines and midget submarines assigned to engage U.S. ships should they succeed in leaving the harbor. The location of the attack force remained unknown to the U.S. until after the Japanese ships were already returning to the Eastern Pacific; they were not located after the attack, in part because such searches as were organized were conducted south of Oahu despite aircraft and radar reports of the attacking force that morning. This was partially due to direction finding mistakenly placing searchers on a reciprocal bearing. The total number of planes from the 414 total involved in the attack was 350. 39 were engaged in protection of aircraft carriers and other ships during the attack.

The strike launched 200 nautical miles (370 km) north of Oahu. On the home leg, the task force was instructed to counter-attack should American forces locate and engage them, and re-routed south to the friendly base in the Marshall Islands.

enjoy

Answer 3

As to the "why", I have read that the U.S. quit shipping oil to Japan in retaliation of Japanese politics. As the Japanese had enough oil only for a few weeks, of course they became deperate. This makes more sense than the usual hulabaloo such as what they teach in public schools.
Yes, Japan had been overrunning different places; parts of Russia and parts of China!
As to the part about GB, at the time of WWII, GB was already declining; also, they were under rocket attack by Hitler's V2'S, so...
But, there was a good deal of intelligence that suggested Japan would attack Hawaii. I think the big problem was the Americans were listening to the ball game by radio and were not paying attention to "incoming!"
The U.S. had made the big mistake of "putting all their eggs in one basket" by having an entire fleet anchored in one spot (they still do this sort of thing: makes you wonder!)
Anyway, that is a part of the story. That is just it: there are so many stories about what exactly happened!

Answer 4

the simple version the Japanese want to expand their empire, and needed a free hand to do so. the problem as they saw it was that we would intervene and try to stop them. so they took a naval fleet across the pacific to attack our fleet in pearl harbor with carrier borne aircraft.
you need to find a different source than the one you were looking at because magic was a American breakthrough not British. the Brits only decoded the Japanese intentions in conspiracy theories, not reality.

Answer 5

Stupidity on the japanese part thinking themselves as invincible,there were some sound heads in the japanese military that knew picking a fight with the US was a mistake,but their surprise attack on Pearl Harbor was aimed at destroying US naval power and increasing the odds for their side

Answer 6

Why: They feared that the US pacific fleet would attack while they attempted to conquer the rest of eastern asia.

How: newly created aircraft carriers made it easy for them to bring bombers across the pacific and they bombed many battleships- i believe they might have also had a few subs but im not too sure

Answer 7

Pearl Harbor grow to be the reason the united statespassed over the coverage of neutrality and joined WW2 on the Allies area. Japan became an extremely aggresive united states and the Leauge of countries (truthfully what the UN is as we communicate) warned that they might desire to end the aggresion. Japan did not hear; their representative left the League of countries. in spite of the undeniable fact that u.s. grow to be not a factor of the conflict yet, they nonetheless disapproved of Japan's drastic and aggresive strikes and for this reason, they closed off all commerce to and from Japan. This grow to be a considerable difficulty for Japan because of the fact they have been battling a conflict, and that they relied on different worldwide places extremely for organic ingredients because of the fact they have none themselves. the jap became fairly annoyed on the united statesdue to the fact they have been suffering devoid of each and each of the commerce. They for this reason had some dumb theory that they could "punish" u.s. for it and suprise attack a necessary militia base, Pearl Harbor. This grow to be an especially dumb circulate because of the fact up interior the previous, the president, FDR grow to be itching for a reason to head to conflict on the Allies area. Congress, inspite of the undeniable fact that, did not enable him to declare conflict because of the fact the united statesgrow to be not rapidly in contact and there grow to be no danger to them, (up until eventually then) and that they had a coverage of neutrality. The Japenese, with their attack on Pearl Harbor, gave us a reason to head to conflict. Immediatly after the attack, the united statesjoined the conflict and kicked Japanes butt alongside with the the remainder of the Axis powers. desire I helped =)

Answer 8

They thought the US was going to enter the war and eventually go after them, so they wanted to surprise us and get an initial military advantage.

Answer 9

It was to remove the US Pacific fleet, which could have thwarted their conquest of SE Asia.

Answer 10

they thought we would enter the war