I remember a WSU professor that was Asian/Japanese writing an article about how it was the right thing to do to drop the A-bombs on Japanese because that actually was the option that would lead to a quicker end to the war and also create less casualties. It has been several years ago and I don't recall all the details, but IIRC he was saying that the Japanese would have fought fiercely on the homeland and basically to the last man, due to their culture.That’s certainly true in reference to the decision to use the bomb. But the decision about bombing civilian populations had already been made before the bombs were ready…even before Roosevelt died. We were doing it in Germany already, and ramped it up in Japan.
Honestly though, I would argue that there never really was a decision about using the bomb. The Interim Committee only existed as a form of political cover, Truman made up his mind as soon as he was read into it. James Byrnes was on it to make sure it came to the right conclusion. The target cities were preserved and protected from bombing to make the effects more measurable, and that was done months ahead. We used those cities as living laboratories to measure and study the bomb effects and to provide notice to the world of what we had. Plus we’d just spent a couple billion dollars on development, so we were damn well going to use it.
And, for the record, I agree with using it. Maybe not with exactly how we used it - in Hiroshima our aiming point was a civilian bridge closer to schools and hospitals than any military target, and most of the military facilities and infrastructure were far enough away that they weren’t significantly affected. Nagasaki isn’t as clear a case because the bomb missed its target by 2 miles. Honestly I would have lobbied for dropping it on the imperial castle and cutting the head off the snake. Want to see what happens to a “living god” when he reaches 10,000 degrees? Watch while I burn his shadow onto the wall.
Don't know if it accounted for long term radiation exposure or not.