Toshio Saeki Yamaga is a main character and one of the main antagonists in Ju-on: The Grudge.
Toshio is the cursed soul of a dead boy, and a child who was murdered by his father along with his mother Kayako Saeki. This led to them becoming evil spirits. His mother then killed his father in revenge leading to him becoming an evil spirit as well. The three of them then haunt and kill people.
- Tsuyoshi Murakami
- Mizuho Tamura
- Taiji Suzuki
- Kazumi Tokunaga - supernaturaly suffocated to death on her bed.
- Aki Harase
- 3 unnamed boys
- Sukeru Takagi
- Jennifer Williams - supernaturaly suffocated to death on her bed.
- Trish Kimble
- Toshio is often characterized by his pitch-black eyes, pale skin, and the haunting meowing sounds he makes.
- Toshio's first appearance was in Takashi Shimizu's short movie "4444444444".
- played by several child actors, being Ryôta Koyama in Ju-on: The Curse and Ju-on: The Curse 2, Yuya Ozeki in Ju-on: The Grudge, Ju-on: The Grudge 2, and The Grudge, Ohga Tanaka in The Grudge 2, Shimba Tsuchiya in The Grudge 3, Shūsei Uto in Ju-on: White Ghost and Ju-on: Black Ghost, Daiki Sawada in 4444444444, Kai Kobayashi in Ju-on: The Beginning of the End, and Ju-on: The Final, Rintaro Shibamoto in Sadako vs Kayako, and Garrett Masuda in Scary Movie 4.