Koji Shiraishi, you absolute madman.
Occult wasn't quite as good as Noroi: The Curse, but it was almost as engaging and had some parts that were very unnerving, just like that other found footage film. Shiraishi is a director who seems to understand how to make a mockumentary horror movie really well, and I'll have to keep digging into more of his stuff (A Record of Sweet Murder was also good).
The only complaint I have about Occult is that the middle act sags a bit. It gets off to an intriguing start, is relatively creepy for a while, and then drifts away from its most interesting character for a bit (the survivor of a seemingly random attack that claimed two other lives). Once things center on him again for the final 30 to 40 minutes, I thought Occult got interesting again, not to mention very suspenseful (more of a thriller than a horror film, really). The ending is bizarre on a few different levels, including the fact that Indiana Jones and the Kingdom of the Crystal Skull factors into the plot, and no, I will not elaborate further.
I also thought the music was incredibly done here. The composer went nuts, and it felt like Aphex Twin but more insane and intentionally unsettling; like how Aphex Twin might sound during a bad trip. It was creepy, flawed, but largely entertaining and interesting stuff. It takes a couple of big swings that don't quite hit, but it works in so many other areas that I feel like those flaws don't end up weighing it down much.