The Japanese shogunate period lasted for hundreds of years in Japan, and it was not until after the Meiji Restoration that the emperor came to power. During this period, the shogun was in charge of everything, and the emperor became the titular emperor, that is, to blackmail the son of heaven to order the princes, to put it bluntly, a puppet. But for such a long time, no shogun overthrew the emperor and established himself as emperor, which is very strange.
In fact, the reason why the shoguns could not depose the emperor and stand on his own feet was that there was only one reason why they did not dare, and their concerns were very many.
Many people should say, look at our Chinese history, many great generals have great power, except for a period of time to blackmail the son of heaven to order the princes, they have been deposed by the emperor and themselves. And this is also a very common thing, especially in a chaotic world.
In fact, the difference between the emperor of Japan and the emperor of ancient China is very large. The emperor is not only the supreme leader of secular power, but more importantly, the emperor has long been mythologized in Japan, and it is said that the Japanese emperor is a descendant of the god Amaterasu in the Japanese creation myth. Not only that, but it is mainly the emperor's deep-rooted influence in the hearts of the Japanese people.
So don't look at the shogunate making a fuss, but if they really want to replace it, they don't have this power for the Japanese people. If the emperor is to be forcibly deposed, then there is only war.
And we know that Japan itself is not a great unification in history, the shogunate that holds great power is only the most powerful, and there are large and small daimyo or princes distributed throughout the country, and the domain is still relatively independent. Their strength was not weak, and if united, they would pose a great threat to the rule of the shogunate.
To put it bluntly, the power of the shogunate comes from the emperor, and once the emperor is gone, and the shogunate wants to replace him, then it is bound to be opposed. And the shogunate did not have absolute power to stabilize all this.
Therefore, for the shogunate, in fact, it is enough to hold great power, and the emperor cannot influence it. If the children and grandchildren are fighting, it is enough to continue.
But like the Chinese emperors, shogunate rule was at its peak and undervalued or even replaced. So in general, only the founders of the shogunate or the truly ambitious would consider replacing the emperor because they thought they were powerful.
As for the shoguns in the shogunate lineage, they were often dimwitted and incompetent, not enough to change anything.