It is inappropriate to call Japan and Germany fascists at first.
The so-called fascism only refers to the regime represented by Italian ruler Mussolini (fascism is a ceremonial weapon of the ancient Roman empire, that is, several sticks are tied with ropes and a tomahawk is inserted in the middle, indicating that unity is strength). Because Mussolini's political slogan was to revive the Roman Empire, he used this ceremonial weapon to name his political organization.
Germany should be called Nazi, which is a German transliteration of national socialism.
And Japan should become militarism.
These three political forces are different in organizational forms and core concepts. The purpose of its World War II alliance is also different.
Germany's purpose is to avenge World War I, recover Alsace and Lorraine ceded to France, and expand its sphere of influence in Central and Eastern Europe.
Italy aims to dominate the Mediterranean, carve up British colonies in North Africa and expand its sphere of influence in Southern Europe.
The Japanese aim is to dominate the western Pacific, carve up the colonies of Britain, France and Holland in Southeast Asia, and bring China into their sphere of influence.
As for the moustache, it should be a very popular fashion at that time. If you watch Soviet movies about World War II, such as the Moscow War, you will find that some Soviet officers also have such moustaches. In fact, many people in the Japanese army don't have moustaches, such as Okamura Ningji. On the other hand, Hideki Tojo has a more ordinary moustache.