The authorities of the United States was interested in establishing the power in the western part of the Pacific Ocean and thus being the first country among their allies to make a significant contribution to the defeat of Japan.
They recommended preparing that till the time of holding the Potsdam Conference.
It certainly played a role in President Truman’s decision to accelerate the use of atomic bombs, the first of which was dropped on the city of Hiroshima.
From this, the war of the Soviet Union against Japan was fair for its people, while for the victims of the Japanese aggression (and the Japanese themselves) it had a humane face.
Having sanctioned the use of the atomic bomb in these conditions, the US leadership, in its turn, indicated political and military adventurism that led the world to a historical nuclear stand-off.