Oh, you people are too young. Yes, us sane folks can all agree on clear actions that can be classed under good and evil but for the most part it's subjective. Many Americans hate communism and the Communist Party of China, according to them it's evil and they should do away with it, they believe the world will be a better place. The same Europeans who are justifying colonialism, forced settlement, mass displacement of natives, genocide and slavery are the same people who are moaning about immigrants that have flooded their countries. They tell you it was "conquest", I tell them well after Russia slices Ukraine and takes a chunk of it then it's rightfully theirs because it's conquest as well. In other words: "when I do it, it's good. When the others do it, then it's wrong!"
So you think going to Japan and forcefully removing their emperor and killing the institution will get you a round of applause and you'll be greeted as great liberators for being the good guys? Don't be naive. The same way you're looking at them (the institution) as evil is the same way folks are looking at the CPC and it's brand of politics as evil and they've dedicated resources to bring it down. Outside of retribution, I simply can't see the point of forcefully abolishing their monarchy. Why bring the heat on yourselves? Why create a hostile environment? There's a reason why even the Americans didn't do it and resisted the urge to do so even though they would've been justified. The cost of having a potential hostile population was too great and so they thought better of it and decided to keep it but neuter the institution. You don't play the game with your emotions, if you do you've lost.
Good and evil are something you have to understand for yourself, not someone else telling you!
You keep repeating Western media propaganda, and I find it hard to believe you're an independent thinker.
Europe's centuries of colonization of Africa were undoubtedly evil. But can the West now claim the Communist Party was evil? Can they find any strong evidence? Look at a map published in China, and you'll be surprised to find that Crimea still doesn't belong to Russia. Do you understand the meaning of this?
Why did the Russo-Ukrainian war break out? I believe you haven't done any careful research, because in your eyes, anything that opens fire is wrong. As for color revolutions, they're all about pursuing democracy and freedom, and are just!
We're not asking for trouble, but others are picking on us. Is the emergence of the far right a result of our own creation of a hostile environment? What allowed Sanae Takaichi to appear here? Why don't you think about this?
As for why the United States allows Japan to retain these old systems, that's a very complex question. Simply put, Japan is currently a colony of the United States. Colonies don't need a normal political environment; as long as they can serve as a bridgehead for anti-China and anti-communist movements and can be controlled by the United States, that's enough.
