Kiyoshi Kurosawa’s Pulse (2001) is a landmark of Japanese horror, turning the rise of the internet into an eerie meditation on loneliness and death. A defining film of the J-Horror era, it blends supernatural dread, psychological unease, and haunting digital imagery into one of the genre’s most chilling modern classics.

Arrow Films

Award-winning filmmaker Kiyoshi Kurosawa delivered one of the finest entries in the "J-Horror" cycle of films with this moody and spiritually terrifying film that delivers existential dread along with its frights. Setting his story in the burgeoning internet and social media scene in Japan, Kurosawa's dark and apocalyptic film foretells how technology will only serve to isolate us as it grows more important to our lives.

A group of young people in Tokyo begin to experience strange phenomena involving missing co-workers and friends, technological breakdown, and a mysterious website which asks the compelling question, "Do you want to meet a ghost?" After the unexpected suicides of several friends, three strangers set out to explore a city which is growing more empty by the day, and to solve the mystery of what lies within a forbidden room in an abandoned construction site, mysteriously sealed shut with red packing tape.

Featuring haunting cinematography by Junichiro Hayashi (Ring, Dark Water), a dark and unsettling tone which lingers long after the movie is over, and an ahead-of-its-time story which anticipates 21st century disconnection and social media malaise, Pulse is one of the greatest and most terrifying achievements in modern Japanese horror, and a dark mirror for our contemporary digital world.

Från IMDB:
Two groups of people discover evidence that suggests spirits may be trying to invade the human world through the Internet.