The Shadow Within
影の車 (original)
When a married man begins an affair with a woman from his past, he comes to suspect her young son intends to murder him.
Starring Shima Iwashita, Gō Katō, Mayumi Ogawa, Yûsuke Takita, Kaneko Iwasaki, Shinsuke Ashida, Yoshio Inaba, Yôsuke Kondô, Akiko Nomura, Atsuko Kawaguchi
It's a drama movie, and has a rating of 7 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from United Kingdom.