One of the most interesting things about Japanese horror is the way it combines the elements of fear while also adding in some ridiculous elements of humor. There are many moments inUzumaki that seem too cheesy (like the circus music as someone else called it or the odd personalities sprinkled throughout the film) but at the same time, the movie manages to still create that suspense that induces the audience's fear. But what makes something so vague as a spiral so frightening?
As Carroll discusses in his Philosophy of Horror, the monster in the film is indiscernible or inconceivable. The spiral is everywhere in the town, and as a member of the audience, it is difficult to even picture how it can cause such incidences. At the same time, it is a shape that is transgressing the boundaries of a normal shape and becoming more than that.