The Happiness of the Katakuris (2001)

The Katakuri's family have build an inn in the countryside in order that the whole family work together. Their first guest commits suicide in his room and they bury the body nearby the lake. Their second and third guests die while having sex and they bury the couple. Soon they receive the con-artist Richâdo Sagawa and they get rid off him. Meanwhile the police officers come to their inn to find a man that killed his wife.