- At the centre of the complex story is Kagutaba, a demon imprisoned beneath the Shimokage village by the sorcerers that summoned him to begin with. Every year, the villagers would pacify Kagutaba by performing a ceremonial ritual. However, when a dam is built over the village, Kagutaba possesses Junko Ishi, influencing her to spread his cult which involves animal sacrifice and suicide. We never see the demon in the flesh until one shot near the very end, but he is represented by an Uncanny Valley face that appears in pictures, drawings, a glitch on Miyajima's camera, and as a horned, blood-covered devil mask worn by Junko.
- Many scenes throughout the film where nothing overtly frightening happens count as this just for the sheer tension in them.
- The mysterious death of the housewife and her daughter at the beginning of the film who live next door to Junko. Their car randomly drove into oncoming traffic, implying the woman lost control of the car, was possessed, or someone may have cut the brakes.
- Hori, a bizarre Cloudcuckoolander with Psychic Powers. While he is technically a protagonist, he is very creepy and disturbing. He wears tinfoil to protect himself from "ectoplasmic worms", his house is a Room Full of Crazy, and he constantly twitches, mumbles, and makes strange noises. That, and he can Freak Out! at the drop of a hat.
- Junko Ishi is revealed to be more and more unstable as the plot goes on. She has stolen aborted embryos which are later forcefed to poor Kana in an attempt to summon Kagutaba. Not mention her quiet Creepy Child of a son who isn't actually hers, and seems to have literally come from nowhere, possibly being the demon itself.
- The unedited footage of the scene in the graveyard reveals that there was an apparition of a male figure mere feet away from the group - Marika looked at it before having her episode. What's more, is although the zoom makes it blurry, it very clearly has Kagutaba's face on an otherwise-human body.
- The disturbing glitch on the camera that shows piles of roughly-made masks resembling deformed faces, accompanied by Hori's slow, deformed scream.
- You'll never look at pigeons the same way again. Kobayashi finds several dead ones outside Junko's house, the crazy Osawa is implied to kill them too, and when Marika is possessed, several pigeons kamikaze their way into the window.
- The suicide cult revealed halfway through the movie who kill animals and then hang themselves using looped nooses. Marika was making these when she sleepwalked.
- The scenes in the forest. Kobayashi pursues a crazed Hori into the woods looking for Kana, finding mutilated dogs and pigeons strung through barbed wire. Coming to an old, abandoned shrine, Hori freaks out and screams. Kobayashi puts the camera into night vision, revealing an apparition of Kana being swarmed by undead embryos.
- Junko's house is insane, too: pigeons have been nailed to every wall and rafter, Kana is dead, and Junko has hung herself.
- The ending. Hori reveals Junko's son is now Kagutaba and attacks him in a crazed state. Kobayashi is knocked down but through his camera, we see the boy covered in blood and with his head ''hideously'' deformed from Hori's strikes to be the spitting image of Kagutaba, and in the next shot, it's merely bloody, implying the 'deformation' was Kagutaba actually showing himself. Kana's ghost stands nearby in this second shot. Then Kobayashi's wife is possessed and sets herself on fire, her trance breaking just in time for her to experience burning to death, while Kobayashi watches, helpless. Hori abruptly becomes possessed and leaves with the boy, and is later found dead, gruesomely mangled and crammed into a ventilation shaft.
- The fact that no one is safe in the movie: The housewife and her daughter die horrifically in a car trash just for telling Kobayashi about Junko Ishi, Marika's neighbor upstairs and a man who fought with Junko in the past as his neighbor ended up killing themselves (with five others) in a park, Kana's father killed his wife and then was arrested by the police, and that's not even getting to the cult village even after the town was submerged by the dam.
- The overall atmosphere of the movie: It presents itself as an actual documentary and uses little jump scares. It works effectively especially with the professional tone.
- Halfway in the movie, Kobayashi takes Marika in for protection and has her stay with his wife Keiko as he tries to figure out the mystery. Keiko records her own footage of her spending time with Marika (who made her food) and while all is well, Keiko witnesses Marika stand still and emit a horrific and terrifying groan all while pigeons kamikaze themselves to their windows.
Nightmare Fuel / Noroi: The Curse