I don't think it is a masterpiece.
Yes, I can understand the theme even if I'm not familiar with Japanese cinematography. There is a lot of symbolism and it acts as an abstract social commentary and I'm sure it resonates a lot better with the repressed Japanese society than it does with me.
However, this doesn't mean it is a good movie. A similar movie that breaks the fourth wall is Dogville. But that movie makes sense. The plot is interesting. There is coherence to it. It hits you hard, emotionally. The final scene feels right even if it is so wrong. It is a masterpiece compared to this.
This movie is a set of almost random scenes that are connected by an overall theme of feminine repression and sexuality and chaos. It's the movie that critics will look at and say "wow, this is so freakin' deep" when as an experiment in cinematography, is fine, but as a movie, fails dramatically.
Sure, you can think I'm a moron and that I don't understand conceptual cinematography and that this movie is not for a caveman like me. But I've seen similar movies and theatre and I don't mind the idea. The idea and concept are goods. The execution itself is flawed. I should have feel shocked or disgusted or thoughtful or anxious at the end and I'm not. I felt bored. I was asking myself "c'mon, when does this end?". The first part was interesting, especially breaking the fourth wall, but overall, I found it a waste of time.