Answer: The cost of lives if the United States planned to invade mainland Japan during World War II would have been very high. This is because the Japanese were known for their fierce resistance and were prepared to use kamikaze attacks and other tactics to defend their homeland. Additionally, the geography of Japan and the lack of suitable landing sites would have made the invasion very difficult and costly in terms of lives lost. Estimates of casualties for such an invasion ranged from 500,000 to over a million, including both American and Japanese soldiers and civilians.
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