Benito Mussolini was the founder of Italian Fascism and ruled Italy as Prime Minister (1922-1943). He invented fascism and was the leader of the National Fascist Party in Italy, not Germany (Hitler), Japan (Tojo), or Portugal (Salazar).
Benito Mussolini founded the Fascist movement in Italy and served as its Prime Minister/dictator from 1922 to 1943. Fascism as a political ideology originated and was defined in the Italian context, distinguishing it from Nazi Germany's separate movement.