What an excellent idea! I must say, though, I have a very weird taste in movies, so I feel like all my suggestions will result in raised eyebrows. However, four of the possible themes posted are themes I really enjoy, so who knows.
I have some fun suggestions for Japanese Horror movies, but they could possibly be seen as more of a comedy than horror, such as Dead Sushi, which is about zombified sushi. That covers two themes at once!