Japan had an army and society built around the warrior class. They considered their emperor a god. Japan would not surrender and would fight until the very last soldier. The US had tried to take some of the outer islands owned by Japan but the losses on both sides were awful to say the least. The Japanese fought until they were all killed either by the US or by their own hand. The losses by the US were almost as many. The emperor refused to surrender. Since he refused, the country had to obey. That left the US with the choice of continuing the fight this way and loosing untold thousands on both sides or finding another way.
It is still debated yet today if this was needed. Yes, it was. The bombs saved many on the the US side and on the Japanese side.
The emperor surrendered when he spoke to the country after the bombs were dropped. That was the first time most had even heard him speak. Since he surrendered, the country obeyed him and all put down their arms.
they were atomic bombs.
Hiroshima, Japan
the US decide to drop two atomic bombs on Japan, not china
The drop of the atomic bombs on Hiroshima and Nagasaki
sure?
In Hiroshima
Japan never dropped the atomic bomb on anyone. They did not have that technology.
No, the Japanese military did not drop any bombs on the USA after the atomic bombs were used on Japan. The bombs and pending invasion by the Soviets and the Americans (and allies) motivated the Emperor Hirohito to surrender to the Allied Forces.
Hiroshima and Nagasaki
They did not, it was the other way round.
Truman
If you are referring to WW2, then the US stopped using atomic bombs on Japan because Japan agreed to surrender. Had they not, the US had plans and production setup to drop a total of 23 atomic bombs on Japan in 1945.