It’s called complete unconditional surrender period. No quarter given. Total war.
Except there was no "unconditional surrender period." That is an utter myth.
At the Japanese's insistence, the Potsdam agreement was rewritten so the nation of Japan was excluded from the terms of surrender. The terms only addressed the surrender of the Japanese military. Not the country or the government.
Japan never surrendered. Period.
The agreement also avoided addressing the Japanese's other "hot button" issue, the disposition of the emperor. Its terms left that decision to discretion of MacArthur. They played "kick the can" with issue of the emperor knowing full well that Mac felt that the maintenance of the emperor was essential to the stability of post-war Japan.
Which was a tacit agreement to accept the Japanese's terms to maintain their emperor.
The claim of "unconditional surrender" is a whitewashing of the Allie's (pragmatic) acquiescing to Japan's terms.