The Sinners of Hell aka Jigoku
(Japan 1960) (Many thanks to DarkStar78)
(Horror|Supernatural)
The story tells of a young theology student who flees a hit-and-run accident, he is plagued by both his own guilt-ridden conscience and a mysterious, diabolical doppelgänger represented by Tamura, who appears to know everyone's darkest secrets.
Eventually more deaths seem to occur around him, including his own which sends him plummeting into Hell.