If you loved Red Finger, try The Voice of Sin
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
What they share
Both films are directed by Nobuhiro Doi, and they sit in Crime / Mystery territory. If that's the register that drew you to Red Finger, the second film will land in a comparable space — through a different lens.
What The Voice of Sin is
Kyoto, winter. Snow muffles the streets outside a shuttered tailor shop. A man finds a cassette with his child voice whispering numbers. A reporter in a basement archive rewinds a tape that shouldn’t exist. Two threads pull toward a silence that predates recording.

