I have seen the interview with the director. He said that he thought of making such a film because his family died. The question he wants to think about is: "The victim, why can he become a victim, why is it him and not someone else? "
There are too many articles analyzing Japanese, wizards, and unknown girls, but the real protagonists are the fat policeman and his family.
In the end, the Japanese said a lot of words to the deacon in the cave, to the effect: "I can say that I am anything, but it doesn't matter what I am, what matters is what people believe I am".
Both the good and the evil of human nature may be exploited, and the real evil begins with human nature. The fat policeman has many human characteristics, and finally he took the road of violence, maybe out of love for his family, or maybe out of fear of the Japanese. That's why the wizard finally said that when ghosts kill people, they don't have a specific goal, they just design a temptation and wait for someone to take the bait.
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