The reason Japan lost WWII to the Allies was that its industrial and technological capacity was not as strong and advanced as the American and British one. After the Japanese attack on Pearl Harbor on December 7, 1941, the Japanese military thought they had inflicted a permanent, crippling blow to the US Navy. However, it only served to reawaken, or reactivate, a dormant industrial giant, which would soon mend the dent that the air raid really represented, launching an aircraft carrier every four months and churning out fighter aircraft and bombers by the hundreds.
Even though Japan was able to deploy more than one and half million soldiers, with 170 infantry and 4 armored divisions, the tanks and guns the Japanese used were also inferior to that of the Allied ones; for example, the Type 95 Ha-Go, which was one of the best Japanese tank, was not a match for the American Sherman M4 in terms of armament and armor. The Japanese tank was fitted with a 37mm gun, while the American had a 76mm gun in its turret. The Allies also had more advanced radars, sonars, and decoding machines in their warships.
Although the Imperial Japanese Army and Navy had highly trained and experienced pilots as well as fast and maneuverable fighters, such as the A6M Zero, the superior industrial and technological capacity of the United States would soon produce even faster, more maneuverable, better armed, and sturdier fighters, such as the F6F Hellcat and F4U Corsair, that would make the difference in the skies over the Pacific. But it was the introduction of the B-29 Superfortress, an American long range bomber with a high bombload capacity, that completely destroyed Japan’s industry, leveling the most imortant cities in Japan’s mainland, and snuffing out all hope of winning the war.