Have just watched an animated Japanese film called Angel's Egg, which was made in 1985.
It is available here on Youtube:
If it's Japanese weirdness you want then it is Japanese weirdness you will get.
Although very little actually happens and it is rather slow.
And I must admit that I did not really understand what was going on.
Verdict: This film is not entertainment. It is art. It is very arty and not at all entertaining. I got very little out of watching it.
I don't know how I'd rate it as art but I would certainly not rate it as entertainment.