If you loved K-20: The Fiend with Twenty Faces, try UNFAIR: the answer
A bridge between a film you've already seen and one most people haven't. UNFAIR: the answer has roughly 4.6× fewer votes than K-20: The Fiend with Twenty Faces — it's a deeper cut, not a mainstream recommendation. 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 Shimako Sato, and they sit in Action territory. If that's the register that drew you to K-20: The Fiend with Twenty Faces, the second film will land in a comparable space — through a different lens.
What UNFAIR: the answer is
Hokkaido winter. A phone's ring. Yukihira, exiled after the hospital incident, now polices snowdrifts. Back in Tokyo, corpses bloom with nails. Her ex's prints are on one, and he's soon fugitive, begging Yukihira for help with a data stick exposing dirty secrets, before she's framed. Sato's thriller plays on Yakuza film beats.

