Takeo Saeki

Takeo Saeki is one of the main antagonist to appear in Jun-on: The Grudge. He was previously an illustrator who worked in Nerima and was Kayako's husband. When Takeo learns that Kayako is supported by a Toshio Saeki teacher, he then kills her and also kills Toshio, eventually he is killed by Kayako. And he himself becomes a ghost and haunts the house killing everyone in his path.

Original Series
Takeo Saeki is an illustrator who works in Nerima, is married to Kayako and has a son named Toshio. When Takeo learns that Kayako is having an affair with a man who is a Toshio teacher named Shunsuke Kobayashi. Takeo then becomes obsessed with the idea that Toshio is Kobayashi's son. After Toshio kills both his wife and son. Takeo then goes to Kobayashi's apartment and kills Manami, then kills Kobayashi with a telephone booth. Later eventually Takeo is killed by Kayako and becomes an evil spirit. Then Kayako begins to kill, and victims are paralyzed with fear, and she tears them off with her claws.