How the legal position of post-war Italy differed from that of Germany and Japan. Why?

After the Allied landings in Sicily and on the Italian mainland, Mussolini’s fascist regime was overthrown by the republican government, which went to war with Germany. It was this country that began to be considered as a new Italy, therefore Italy was not interned, was not subjected to such partitions as Germany, from which vast territories were taken away, Japan, in which the state system was changed and which became practically a US protectorate, did not pay a huge indemnity.