明治以来、工業都市としての道を歩みはじめた 大阪。 昭和10 年代には、大大阪の呼び名のもと、人口は日本第2 位となる300 万人を越え、賑やかな大都市となった。

また、軍需産業が盛んであった。
大阪は軍都の一面も有していた。
1937 年日中戦争勃発。
1941 年には太平洋戦争へと突入した。
1944 年頃以降、日本の戦況は悪化し、米軍の戦略は日本本土の爆撃へと移った。

人口が多い大阪は1943 年頃には米軍の空襲計画に設定されていた。
米軍の大型爆撃機がマリアナ基地から飛来し、軍需施設を狙った爆撃を行なった。
さらに1945 年3 月以降は、都市部への本格的な無差別攻撃へと転換した。

Since the Meiji era, Osaka has become an industrial city. In the Showa era, (the decade between 1935～1944), known as “The Great Osaka”, with a population exceeding 3 million, (the second largest in Japan at that time), Osaka transformed into a lively metropolis.
It also had a thriving munitions industry which made it the military capital.
In 1937 the Sino-Japanese War broke out.
In 1941 Japan plunged in the Pacific War.
After about 1944, the Japanese war worsened, and the strategy of the U.S. forces shifted to bombing the mainland of Japan.

The U.S. forces planned to bomb Osaka in 1943 because it had a large population. Large-sized U.S. Air force Bombers flew from the base in Mariana and bombed military installations in Osaka.
After March,1945, the bombings became a full-scale indiscriminate attack on urban areas.

本指南将以英文提供。

Since the Meiji era, Osaka has become an industrial city. In the Showa era, (the decade between 1935～1944), known as “The Great Osaka”, with a population exceeding 3 million, (the second largest in Japan at that time), Osaka transformed into a lively metropolis.
It also had a thriving munitions industry which made it the military capital.
In 1937 the Sino-Japanese War broke out.
In 1941 Japan plunged in the Pacific War.
After about 1944, the Japanese war worsened, and the strategy of the U.S. forces shifted to bombing the mainland of Japan.

The U.S. forces planned to bomb Osaka in 1943 because it had a large population. Large-sized U.S. Air force Bombers flew from the base in Mariana and bombed military installations in Osaka.
After March,1945, the bombings became a full-scale indiscriminate attack on urban areas.

이 안내는 영어 문장으로 안내합니다.

Since the Meiji era, Osaka has become an industrial city. In the Showa era, (the decade between 1935～1944), known as “The Great Osaka”, with a population exceeding 3 million, (the second largest in Japan at that time), Osaka transformed into a lively metropolis.
It also had a thriving munitions industry which made it the military capital.
In 1937 the Sino-Japanese War broke out.
In 1941 Japan plunged in the Pacific War.
After about 1944, the Japanese war worsened, and the strategy of the U.S. forces shifted to bombing the mainland of Japan.

The U.S. forces planned to bomb Osaka in 1943 because it had a large population. Large-sized U.S. Air force Bombers flew from the base in Mariana and bombed military installations in Osaka.
After March,1945, the bombings became a full-scale indiscriminate attack on urban areas.