I wrote in my post that the producers of White Light/Black Rain are Japanese ... actually, the Executive Producer - Mr. Steven Okazaki - is an American of apparent Japanese descent.
HBO published an interview with Okazaki on their website at
http://www.hbo.com. In the interview, Okazaki claims that the four Americans he interviewed who were part of the mission to drop the bomb "made powerful anti-war/anti-nuclear weapons statements at the end of the film."
I don't agree with Okazaki's characterization of their statements. What I heard those four elderly participants describe was their concern over nuclear proliferation and the potential for active use of nuclear weapons in today's world. That is a valid concern of virtually everybody in the world today, regardless of whether one is anti-nuclear or anti-war, or not - including President George W. Bush, who is obviously not anti-nuke or anti-war.
There is no inherent evil associated with nuclear weapons per se. The critical issue is, who has them, and how do we make sure that they aren't actually used, as opposed to serving as deterrents to another bloody World War.
As a deterrent, nukes proved to be extremely effective in preventing another world holocaust. The fact is, between the early 1930s, when Japan first invaded its neighbors in Manchuria, and 1945, about 76 million people were killed in war. All but about 200,000 of those deaths were due to causes other than nuclear weapons. Yet, in the 62 years since 1945, all of the war deaths in all the wars fought come to no more than a very tiny fraction of the 76 million killed in WWII.
Therefore, how many hundreds of millions, perhaps even billions, of people who lived in the last 62 years owe their lives to the existence of the nuclear deterrent? We'll never know, of course. Thankfully.