At least four different opinions emerged about potential casualties. These estimates for U.S. losses on Kyushu ranged from as low as 31,000 for just the first thirty days, to a total of about 280,000
US casualties are unacceptable. Drop 2 bombs on the country and you get what you want.
Blockade assumes there would be no negatives associated with the blockade.
Gideon Rose, the editor of the journal Foreign Affairs, estimated that during every month of 1945 in which the war continued, Japanese forces were causing the deaths of between 100,000 and 250,000 noncombatants.
The question also assumes the Japanese no longer had the ability to harm others. Japan had a very active and successful bacteriological warfare program - they had killed an estimated 300,000 civilians in China - and were planning on using their balloon delivery systems to send disease (plague, anthrax, etc.) to the US. See wikipedia: Unit 731: Germ Warfare Attacks
That's the cost of continuing your hypothetical blockade. It was much more effective to get it done with by dropping the bombs. Plus you are also starving the Japanese out.
Given that people would continue to die if we just waited around it was wise of Truman to drop the bomb. A quick finish to a tiresome war.
There's also this:
https://en.wikipedia.org/wiki/I-400-class_submarineContinuing the war meant them using the submarines to attack the mainland.
The Japanese were not our friends during that time. Fuck waiting a few months. They sure as hell didn't wait to strike Pearl Harbor. Accept the terms or get bombed. America and Truman who ran it had the duty to save American lives. America looks at America's interests. Not to care about Japanese lives but care about American lives. Japanese lives didn't matter at that time. And, that was a good thing.
Go to hell. What the fuck did tens of thousands of civilians do for that? Oh, they're within a certain geographic area, they deserve to die because you can't accept one term, or you can't wait a few fucking months for some prick miles away to sign some papers to stop your conflict.
It's called collateral damage. You even had suicidal citizens who killed themselves and their children because they were ordered to by the Japanese government.
http://www.japantimes.co.jp/news/2016/05/13/national/majority-see-no-need-for-obama-to-apologize-for-atomic-bombing-of-hiroshima-and-nagasaki-japan-times-poll/80% of Japan sees America favorably. They hold no resentment over us and has forgiven us.
Edited 7/23/2016 07:22:47