Hitozuma: Midara na Jôyoku (2000)

Igari, a photographer, discovers a rock resembling a Jizo statue deep in the mountains and snaps a picture of it. Soon after, strange things begin to happen to him. His previously sluggish libido surges with tremendous power; he delights his wife, Misato, but also ends up groping a woman on a train. He even dreams of raping Ritsuko, a housewife living next door. The next morning, the police arrive after Ritsuko is actually assaulted, leaving Igari to view his own actions with suspicion...