I doubt the American military and public was in any mood for a negotiated settlement after Pearl Harbor
Another Yamamoto miscalculation
HE didn’t miscalculate, simply warned his government. I don’t think he ever believed victory was possible, and was hoping for a settlement instead.
Not an outlandish concept; Americans forget that while we were slogging our way across the Pacific, and supplying the USSR, Japan and the USSR had a peace treaty that lasted until late 1945.