Excuse me, but 2,600,000 Japanese died in WWII. That is 36.1 deaths per thousand population. The US death total was 3.6 per thousand.

Again, the massive fire bombings and killing of significant segments of civilian populations had a dramatic effect on the Japanese population, but the main difference was allowing Japan to keep their Emperor in place. So long as the Emperor was standing, if only a figurehead, there was no incentive for Japanese resistance. The Japanese swore their alligance to the Emperor alone.

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"Victory at all costs, victory in spite of all terror, victory however long and hard the road may be; for without victory, there is no survival."
Winston Churchill