What was the deciding factor for the Japanese surrender in world War II? Was it the dropping of the atomic bomb by the United States or the Russians entering the war?

by kilo3one

As an American, I've been fed the narrative that the atomic bomb is what drove the Japanese to the negotiating table for surrender. As of recent, I've been reading that the Russians entering the war, played a more pivotal role then the atomic bomb. Would love some education and clarity in this matter.

Thank you and I apologize if this question is already been asked on the subreddit.

jschooltiger