You cannot say that this is a comedy but if you think about the Human Comedy. the Funeral is honestly very slow for an american-European eye even if Itami is the Japanese Wilder. His movies are very direct and versus the japanese idea of a normal society with normal people. The cadaver of the family's grandfather is the first step of a fracture between the family members... every shot is a dose of poison biting the apparent Tradition during the rite.
Review of The Funeral
