Avoiding blame
As usual, the US was implied to be the bad guys in this movie since we dropped the bomb. No where in the movie was it mentioned that the Empire of Japan started that war, first by invading and trying to occupy and enslave China, then expanding it by bombing Pearl Harbor along with British and Dutch holdings bringing them into the war. The bombs were dropped to avoid massive casualties that were expected during the invasion of the Japanese homeland. Casualties were estimated to be in the millions (dead, wounded and missing). The losses at Hiroshima and Nagasaki were minimal compared to a full scale invasion and all the destruction that comes with it. Don't get me wrong, it was a terrible thing to do, drop those bombs, but when it came to killing the enemy or having our people killed, guess who loses out. And the bottom line is they started the war.
Japan has never accepted responsibility for starting the war yet, as well as their barbaric behavior towards prisoners and occupied peoples according to their anti-human "bushido" code. They prefer to play the victim, as the first and only receivers of the atomic bombings.