Bad ending, sorry kids *spoiler*
I'm sorry, but the ending is just completely unsatisfactory, and you can write it off as "Oh, it's foreign, us Americans are just stupid", but it doesn't excuse it. This is how I read it:
The ghost girl had parents that were totally neglectful of her, falls into the water tank and drowns. In revenge, she attaches herself to Yoshimi and wants to off her daughter so she can take the daughter's place. Great. So instead of MOVING OUT OF THE GODDAMN APARTMENT COMPLEX, Yoshimi abandons her daughter to live in a watery hell with the ghost girl. Whoopie. So I guess everyone got what was coming to them.
It's a load of garbage. No, it doesn't have to be completely satisfactory, but WHY can't she just leave? She has no reason to stick with the ghost girl, it doesn't benefit her, it doesn't benefit her daughter, it just makes her and her daughter miserable.
NOW, what WOULD make sense is if the ghost girl was Yoshimi's FIRST daughter, and due to her neglect, the daughter died AND this whole divorce thing got started. That would make sense. It would lead to a sad ending, not a Hollywood happy ending, but an ending that MADE SENSE. And all they would have to do is change a few minutes of film. If this is what is supposed to be the interpretation, there's no evidence of it. I've seen it twice and could see no hints that the ghost girl is Yoshimi's daughter. The ending is just terrible, Yoshimi abandons her daughter and goes to hell instead of leaving the apartment complex. I tell you, rent at that place must have been golden.