The Inugami Family (1976)

Previous film by the same director that instead of building the portrait of a Patriarch's testament, build a family story based on a Matriarch' s will.

Both share the same plot without the murders. In "The inheritance", A rich business executive is dying and decides he wants to meet with his three illegitimate children before dying to see if they're worthy of including in his will. This sets up a mad scramble between his relatives and employees to see who can best finagle the situation to their advantage.

Both are classic horror mystery movies directed by Kon Ichikawa. Both are based on famous mystery novels about two of famous Japanese Detectives. Both are very similar.................................................