You are very welcome. As to your last para, if that means what I think it does, my thanks for your service.
As to your first para, no one has any level of expertise, with respect to subjects like this, in any sense of the word, without a good deal of weight-lifting, to get it. That means books, for depth of information and it means multiple books, from all aspects of the field of scholarship related to the topic, to the degree that contentious viewpoints make that necessary. And it takes time. I happened to be in an excellent position to do such things, beginning, roughly 1994, and still going. A life-long book collector, focusing since I was 10 on WWII as one of my main areas, 14 years in the book selling business, including rare and collectible titles, and the means and background to seriously pursue any subject area that I become seriously interested in. The bombs are only one such topic, but without a doubt the one in which I most often confront folks whose background in the area is minimal and limited to keyboard clicks. And, being a touch O-C, here I am, repeatedly.
"Their " Manchurian and Korean territories were theirs only from direct, brutal imperial conquest, over the preceding 30+ years And the Japanese knew that they were not going to be theirs much longer. They represented the first fruits of the reason that Japan went to war originally: to build an Eastern empire, and to replace all such Western colonial masters, by assuming Japans proper role as an imperial power, in like image, supreme in the Greater East Asia Co-prosperity Sphere, i.e. The Japanese Empire. They held such territory they conquered before the tide was reversed, by the sword and direct subjugation.
When the handwriting was on the wall, the 6 members of the Supreme Committee for the Conduct of the War, the true power center in the nation, were roughly split between realists and hardliners. The realists insisted only on the preservation of the kokutai, the one condition, before surrender. The hardliners, led by General Anami, held for.multiple additional conditions: that the military would disarm itself, that the Japanese government would conduct any necessary war trials, that the Home Islands would not be subject to occupation, and that Japanese would be permitted to keep some of their territories, Korea and Manchuko in particular. Those 5 hardline conditions rapidly shrank to four, as the fact that at the very least, the territory conquered by the sword would not be held, when the sword was removed. Henceforth, the hardliners were known as the Four Condition faction, not Five.
There is much more history here. But I have been alerted that you and I have been taking too much.