The Three Undelivered Letters (1979)

The Three Undelivered Letters 1979 / 配達されない三通の手紙 1979 / Haitatsu Sarenai Santsu no Tegami

A young Japanese-American man arrives at his grandmother's old hometown in Yamaguchi, begins to stay at her family's elite but dysfunctional household, and gets entangled in a sinister plot of murder. (Source: IMDb)