Because we totally obliterated two of their cities and many parts of their military. Also because we wanted to improve relations between us and Japan. One thing, though, is that the amount of radiation embedded in the soil is still there today. Though thankfully, not as much.
japan went into a neutral state of living after the war
Are you serious? The USA!
It ended in Japan, not in Derby.
To end the war and to collapse Japan's means to make war.
America is a crappy country.
Nagasaki, Japan
Germany, Japan.
12000000
The Marshall Plan
The Japanese Instrument of Surrender was the written agreement that enabled the Surrender of Japan, ending World War II.
japan went into a neutral state of living after the war
The United States wasn't at war with Japan in WW1.
Soviet Union
Soviet Union
Nuclear fission
Soviet Union
Are you serious? The USA!