Thanks markomalley. This is a big deal, a sea change in Japan. BTW, they were lucky we only had two nuclear bombs, and that the young officers' plot to kidnap Hirohito and stop the surrender broadcast failed thanks to the loss of electrical power in the palace.
There was lots of advance planning, debate, and strategic discussion on how to use subsequent nuclear weapons. It looks like the third atomic bomb parts (including the plutonium core) were en route to the Pacific and made it as far west as Moffett Field in California when the war ended. It was going to take only a few months to get production up to three bombs per month.
I learned this week that Oppenheimer had proposed sometime in ‘45 that Little Boy (the Hiroshima uranium bomb) could be repurposed somehow into many more weapons, but Groves refused the concept in favor of speed.
We had a third one on the way to the Pacific when they surrendered. Had they not done so they would have be hit again.