A lesser film in the Hideshi Hino series. A bit surprising maybe, as Mari Asato is a pretty decent horror director, and should've been capable enough to handle a film like this. Some effects are really too poor though (not to mention utterly pointless, like the car ride in the beginning of the film), which makes it a lot harder to enjoy this one.
Daio is a young boy growing up in a loving family. A carefree car ride turns into a nightmare when the boy sticks his head out of the window and is decapitated by an oncoming truck. The mother is devastated, when she's given the chance to resurrect her son, she leaps at it right away. The boy who returns isn't quite the son she remembered.
If properly executed, it could've been pretty interesting, but this felt more like a poor Teruo Ishii clone with bad CG. The effects are truly poor, the performances are awkward and the horror never really impresses. The film is pretty weird and out there, so there's at least some appeal, but not enough to save The Boy from Hell.