Hideo Nakata’s Dark Water (2002) is a haunting and heartbreaking Japanese horror film about a mother and daughter who move into a rundown apartment where strange water leaks and ghostly presences begin to manifest. Adapted from Koji Suzuki’s short story, it blends supernatural dread with maternal anxiety — a deeply emotional follow-up to Ring’s psychological terror.

Arrow Films

After terrifying audiences worldwide with the blockbuster J-horror classic Ring and its sequel, director Hideo Nakata returned to the genre for Dark Water, another highly atmospheric, and critically acclaimed, tale of the supernatural which took the common theme of the "dead wet girl" to new heights of suspense and drama.

Based upon on a short story by Ring author Koji Suzuki, Dark Water follows Yoshimi, a single mother struggling to win sole custody of her only child, Ikuko. When they move into a new home within a dilapidated and long-forgotten apartment complex, Yoshimi begins to experience startling visions and unexplainable sounds, calling her mental well-being into question, and endangering not only her custody of Ikuko, but perhaps their lives as well.

Beautifully shot by the same cinematographer as Ring and Pulse, and featuring an especially unnerving sound design, Dark Water successfully merges spine-tingling tension with a family's heart-wrenching emotional struggle, creating one of the very finest and most unsettling contemporary Japanese horror films.

Från IMDB:
A mother going through a divorce moves into a run down apartment with her daughter. A persistent leak from above, visions of a missing girl, and other eerie phenomena become increasingly menacing as clues to a past tragedy come to light.