It didn't. Japan existed long before the atomic bomb
The US dropped the atomic bomb onto Japan on August 1945.
Harry s. truman approved the dropping of an atomic bomb on japan.
The first atomic bomb was dropped on Hiroshima, Japan ; another on Nagasaki, Japan, 3 days later.
atomic bomb
Japan was negotiatin with the Soviet Union as the first atomic bomb was dropped.
Reconstruction.
Hiroshima, Japan
One day after the atomic bomb hit Hiroshima in Japan.
Japan did not make an atomic bomb. It received two in ww2, one in Hiroshima the other over Nagasaki.
because japan was not ready to surrender.
Indeed, leaflets were scattered over japan warnig about the bomb.