Japan couldn’t learn the first time.
So the US dropped the second bomb….Fat Man, the second time an implosion-type plutonium bomb was ever detonated by anyone on this planet.
I mean, the firebombings that burned much of Tokyo and other cities actually killed more people, and did more to damage the Japanese ability to make War.
But the single bomb causing such damage scared the hell out of the Japanese military and eventually, the Royalty.
It was supposed to be Kokura, but the gods of chance saved the city and it’s inhabitants….weather and the smoke from bombings the night before made Kokura impossible to bomb visually….This doomed Nagasaki, as it was the secondary target.
on August 14, Emperor Hirohito recorded his surrender announcement.
This surrender likely saved most of million allied servicemen from death, and likely ten times that of Japanese citizens.