How many cities in japan did the united states drop an atomic bomb on in 1945?

"Hiroshima and Nagasaki" were the two cities of the japan On which the United States drop an atomic bomb on in 1945.

Explanation:

It was finally decided by the United States to drop the two Atomic bomb on Japan.The Little boy an atomic bomb was dropped on Hiroshima on 6th August 1945. the blast results were devastated half of the building of the city was destroyed. It was estimated that around 75,000 people died instantly and others died later by the radiation.On 9th August 1945, an atomic Bomb called Fat man was dropped on the Nagasaki and the results were same as of Hiroshima.