Air Raids On Japan

Allied forces conducted many air raids on Japan during World War II, causing extensive destruction to the country's cities and killing anywhere from 241,000 to 900,000 people. During the first years of the Pacific War, these attacks were limited to the Doolittle Raid in April 1942 and small-scale raids on military positions in the Kuril Islands from mid-1943. Strategic bombing raids on Japan began in June 1944 and continued until the end of the war in August 1945. Allied naval and land-based tactical air units also attacked Japan during 1945.

The air campaign waged by the United States military against Japan began in earnest in mid-1944 and intensified during the war's last months. While plans for attacks on Japan had been prepared prior to the Pacific War, these could not begin until the long-ranged B-29 Superfortress bomber was ready for combat. From June 1944 until January 1945, B-29s stationed in India staged through bases in China to make a series of raids on Japan, but this effort proved unsuccessful. The strategic bombing campaign was greatly expanded from November 1944 when bases in the Mariana Islands became available as a result of the Mariana Islands Campaign. These attacks initially targeted industrial facilities, but from March 1945 were generally directed against urban areas. Aircraft flying from Allied aircraft carriers and the Ryukyu Islands also frequently struck targets in Japan during 1945 in preparation for the planned invasion of Japan scheduled for October 1945. During early August 1945, the cities of Hiroshima and Nagasaki were obliterated by atomic bombs.

Japan's military and civil defenses were unable to stop the Allied attacks. The number of fighter aircraft and anti-aircraft guns assigned to defensive duties in the home islands was inadequate, and most of these aircraft and guns had difficulty reaching the high altitudes B-29s often operated at. Fuel shortages, inadequate pilot training and a lack of coordination between units also constrained the effectiveness of the fighter force. Despite the vulnerability of Japanese cities to firebombing attacks, the firefighting services lacked training and equipment, and few air raid shelters were constructed for civilians. As a result, the B-29s were able to inflict severe damage on urban areas while suffering few losses.

The Allied bombing campaign was one of the main factors which influenced the Japanese government's decision to surrender in mid-August 1945. However, there has been a long-running debate over the morality of the attacks on Japanese cities, and the use of atomic weapons is particularly controversial. The most commonly cited estimate of Japanese casualties from the raids is 333,000 killed and 473,000 wounded. There are a number of other estimates of total fatalities, however, which range from 241,000 to 900,000. In addition to the loss of life, the raids caused extensive damage to Japan's cities and contributed to a large decline in industrial production. In contrast, Allied casualties were low.