If you loved Poem, try Tokyo: The Last Megalopolis
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 Akio Jissoji. If that's the register that drew you to Poem, the second film will land in a comparable space — through a different lens.
What Tokyo: The Last Megalopolis is
Rainy Tokyo streets at dusk a lone streetlamp flickers Ancient evil resurrected in concrete canyons A product of 80s Japanese fantasy horror.

