If you loved Grave of the Fireflies, try ST: Aka to Shiro no Sôsa File the Movie
A bridge between a film you've already seen and one most people haven't. ST: Aka to Shiro no Sôsa File the Movie has roughly 8.8× fewer votes than Grave of the Fireflies — 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 Tōya Satō, and they both carry the foreign gem mood tag, and they sit in Drama territory. If that's the register that drew you to Grave of the Fireflies, the second film will land in a comparable space — through a different lens.
What ST: Aka to Shiro no Sôsa File the Movie is
A flickering monitor glow in a cramped Tokyo lab—rain streaks the window like static. Samon’s team, a clique of shadowed specialists—forensic oddballs, digital ghosts, one man who never speaks above a whisper—tangles with a serial killer who leaves no prints, no DNA, only silence and a single white feather. Tomohisa, the rookie with a clipboard and doubt, must hold them together as the clock ticks down to the next unspeakable act. Tōya Satō’s procedural thrives on friction and folded hands, not grand reveals.

