Japan -
After the Battle for Okinawa, it was estimated that taking the home Islands would have resulted in the loss of 1 Million Japanese (Conservatively) and 100,000 allied lives
This is a pretty good article with much higher numbers that were deduced after the war, yes we did actually have plans to invade...
There are many such articles with good info about why we dropped the two bombs..
Also I had input from my parents about post WW2 Japan since pops was stationed there in 1953, in fact my Sister was born in Nagoya
https://ladailypost.com/what-if-the-...on-nov-1-1945/