Erotic Ghost Story surely is not as infamous as Sex & Zen - that being said, it was made before that. And you can tell that it is one of the first movies done for (or by) the Cat 3 rules. They still were trying to figure things out - figure, which is something you get a lot here. Ghosts not so much - more like Spirits and beast.
Although I reckon some might argue that in their natural state (is it though?) the beauties are not at all that - beautiful that is. But their human bodies/pods are as good looking as one might hope for. That being said and as the one true part in the international title is being truthful: you get a lot of nudity. Not sure how erotic you will find the things happening. Especially the ones where men convince women by just being persistent ... on the other hand the movie itself does not take itself too seriously, so I don't think it tries to be offensive or should be viewed that way - but fair warning for those who are easily triggered.
And while we're at the subject matter: while most nudity is in the upper area (mostly female of course), there is some flesh down below. And while the bare behind isn't something that most would feel offended by, there is one scene where you can clearly see female genitalia. Without pubic hair to cover it up either. It kind of is unnecessary and out of touch wit the rest of the movie, but it is what it is. Just telling you, in case you get triggered by it.
The movie also mixes a bit of fighting and a lot of comedy into the paper thin plot. I don't remember if I ever saw this or the subsequent sequels (there have been 2 others), but I can't imagine them being as out there - no pun intended. That being said the Naked Killer movie (and the movies that are being considered "sequels", not going to name the titles, you know where to look on imdb if you care) probably went way beyond anything seen here. Not just in the movies but how they treated the actors involved. So I guess while this is not being considered an outright comedy and more an erotic adventure, if you watch it as a comedy it can work. You also have to take into account the sensibilities of the times ... they were different back then - I already gave you examples above.
All in all this is something you have to consider: is it worth your time? It is quite the curiosity and I was intrigued by it. Not titilating or exciting really - but you may feel different about that too.
