If you loved Japan Sinks, try Lorelei: The Witch of the Pacific Ocean
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 Shinji Higuchi, and they both carry the dread mood tag, and they sit in Adventure / Drama / Science Fiction / Thriller territory. If that's the register that drew you to Japan Sinks, the second film will land in a comparable space — through a different lens.
What Lorelei: The Witch of the Pacific Ocean is
1945 Pacific, late summer. A constant ping. Last-hope sonarman Shinichi must distinguish enemy from ally as Japan teeters toward surrender. His submarine I-507 carries a mysterious young woman, Lorelei, who can detect approaching threats. A late entry in the post-Godzilla wave of mournful, FX-heavy war allegories.

