If you loved Ichi the Killer, try First Love
A bridge between a film you've already seen and one most people haven't. First Love has roughly 3.3× fewer votes than Ichi the Killer — 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 Takashi Miike, and they both carry the pitch black, unhinged mood tags, and they sit in Action / Crime territory. If that's the register that drew you to Ichi the Killer, the second film will land in a comparable space — through a different lens.
pitch blackunhinged
What First Love is
Love is a many splendored thing, especially with gunfire. A young boxer meets a imprisoned sex worker in Tokyo. It all goes downhill from there, naturally.

