I think the standard interpretation is that Japan surrendered in WWII as a result of the atomic bombings of Nagasaki and Hiroshima. But why wait until Nagasaki to surrender?

I've read and understand Japan was, much like Hitler, willing to fight to the last man, woman and child against the USA. If this is the case, what difference did it make whether the Japanese were killed by American bullets or atomic bombs in the defence of their homeland?

Finally, is there any record of politicians or generals stating a preference for invasion and occupation by America, as opposed to Russia who they'd seen strip East Germany of much of its wealth?

Thanks very much, and don't feel compelled to answer all three of these!