A foreign government that is told that it will physically survive only upon certain conditions imposed from abroad is, by definition, a puppet government.
Show me a 'japan' in the fundamentalist muslim world. -- The closest are probably Pakistan & Indonesia and they are far to capitalist/'westernized' to ever allow a serious terrorist moverment to use them, or for fundmentalsts to gain control.
Thus, they would be the only candidates that we could use your WWII methods on, AFTER we bombed them into 'unconditional surrender'. You do realize you are talking of the methods of a 'total' WWII type war, don't you?