Wife to Be Sacrificed (1974) Masaru Konuma

Akiko is startled to find her estranged husband, Kunisada, in a car watching a young, prepubescent girl urinate by the side of a road. When Akiko returns home, the girl, Miko, follows crying that Uncle has disappeared. Akiko turns the girl over to the police. Later, while she is giving ikebana lessons at home, the police return to ask Akiko for information about Kunisada. It is revealed that he had disappeared three years ago after being arrested for a sexual crime involving a high school girl.