Hibakusha.
No
The bombing of Hiroshima was only one bomb. It was the atomic bomb called little boy.
Hiroshima 66,000 dead
Hitler had no connection with the bombing of Hiroshima, and in fact, was dead at the time. You need to do some reading on history.
Nuclear science was used in the bombing of Hiroshima.
1945
No.
Yes. The Atomic bombing of Nagasaki, after Hiroshima, is the final act of WW2
Hiroshima was a large city. Several hundred thousand people were "in" the bombing. You need to be more specific in your question.
Takenishi's The Rite is about the bombing of Hiroshima. "The Rite" is specifically about the rites of death, whether it be for Tomiko's miscarried babies, or the victims of the bomb who have no bodies left to honor.
Hiroshima Peace Memorial Park