Banned From Broadcast 3: Stalker Hell.(2004) - Toshikazu Nagae.

A harassed young woman nervously agrees to have the increasingly distressing actions of her obsessive stalker recorded by hidden cameras in this especially unsettling episode of J-Horror FF gem Banned From Broadcast. What started as a series of phone calls very soon escalated to this man taking secret photos and final continues to outright harassment, repeatedly visiting her flat and banging threateningly on the door. It's quite unpleasant watching poor Nozomi suffer so terribly at the hands of this frenzied man. Near the end of the episode, the TV crew discover disturbing revelations about Nozomi's history, and her shadowy Stalker's true identity.