The first event that I went to as part of the evening was the Chucky Horror Factory. This was a sort of standard walk through horror house, lots of jump scares and dudes in costumes screaming at you as you turn around corners. Nothing special, not particularly freaky but I thought that, and this is true for all the horror houses, the props and effects were pretty well done.
After that we checked out the Japanese horror house which was called Tatari
From there we we went into the Exorcist and Nightmare on Elm Street houses which were similar to Tatari in the way you had a hold a rope with a bunch of randoms and walk through the area only this time they were themed on their respective movies. Out of those 2 the Exorcist attraction was significantly better because the set was a bit creepier, the scares were more efficiently set up and there was a little bit of interactivity with the visitors as one guy had to flick water on the girl in the bed.
What's weird is that all these attractions are given a sort of scariness rating. Tatari was rated 5/5 and Elm Street/Exorcist was given a 4/5. However, in my opinion the best attraction they had was the Sadako (The Ring) horror show which was only rated 1/5.
If you're looking for a genuinely scary experience then Universal is probably not the best place to go but it's still an entertaining day out. From my experience of living in Japan for a while, the Japanese are a little sensitive to horror themes and I was having more fun at the reaction of the people in the attractions with us than actually being scared of anything myself. Still, it was a lot of fun and I'd probably do it again next year!