A Japanese horror film tends to take place in everyday life, which frightens the audience into thinking the stories could actually happen. In order to make the movie scary, Kairo uses creepy camera angles and eery music to highlight the vulnerability of being alone.
When someone is alone, that is when things seem scary. Shadows and slow motion foreshadow evil spirits being present. Only when the characters are alone do the ghosts seem to tap into the computers and phones of the victims. The victims mysteriously die alone. The director successfully shows that the loneliness is not safe without showing the deaths, just hinting at it.
The music is extra diegetic to add suspense to the scenes which would otherwise not seem scary. High pitches and discomforting combinations of tones turn a normal person walking toward someone into a creepy ghost stalking an innocent person. Even the lack of music creates suspense because the audience expects something bad to happen when a character is alone. The sounds play off of the fear of being alone while ghosts are present.
Camera angles include high angles and long shots from other rooms to create a sense of someone watching. Even though no deaths are shown in these shots, the mere thought of spying and ghosts makes the simple actions of moving around on screen mess with the audience’s minds. We expect something bad to happen during long shots of people going about their daily lives, but we never see it. Our minds create a horrible outcome for these helpless individuals, which the director hopes for with his techniques.