Watching this film JU-ON (japanese original version)

Ju-on (呪怨 Juon) (also known as Ju-on: The Curse) is a 2000 Japanese direct-to-video horror film. It was written and directed by Takashi Shimizu and is the first full-length entry in Shimizu's Ju-on series, following two short films, Katasumi and 4444444444, released in 1998. It is a film in six parts, chronicling the experiences of tenants of a cursed house where a man, Takeo Saeki (Takashi Matsuyama) killed his wife, Kayako (Takako Fuji), and his son, Toshio (Ryota Koyama), in a jealous rage. It was followed by Ju-on 2 in the same year.
A teacher named Kobayashi returns home to his apartment one evening and talks to his pregnant wife Manami. They discuss a student of Kobayashi's named Toshio Saeki who hasn't been to school recently, and Kobayashi is getting concerned. He looks at his file, reading that his father, Takeo, is an illustrating artist, and his mother is Kayako Saeki, whom he remembers from his college days. Manami remembers her as being very strange. The next morning, Kobayashi visits Toshio's house and finds him around the side of the house with his arms through the bars of the bathroom window. He refuses to talk to Kobayashi. After Kobayashi asks where his mother is, Toshio falls back into the bath tub. Kobayashi enters the house and brings Toshio into the living room to talk to him. After a very brief conversation, Kobayashi hears a strange noise and looks out the window, not realising that Toshio is making a cat-like noise behind his back. There is then a close-up of the house showing Kobayashi looking out from the window as a ghostly woman emerges from the second-floor window.