The Black House(黒い家)

A meek agent at the Showa Life Insurance company receives a phone call from a customer who says that she's planning to commit suicide and wants to know if her policy will pay out. Concerned about her safety, the agent visits her house only to find that her young son has hanged himself. As he investigates further, more and more people connected with this family start having "accidents," and if he's not careful, he might be next.