Sea Without Exit, released in September of 2006, is a reflection on the past and history of suicide torpedoes (and other kamikaze vehicles, for that matter). The movie was directed by Kiyoshi Sasabe, who went on to produce seven more movies as of 2024, one of which, returns to the war plot, but in a different era.

This movie follows the story of the crew of a Japanese "kaiten" submarine carrier. The main character is a fictional kaiten submarine operator named Koji Namiki, who has an extensive history in baseball. Throughout the story, this attention to baseball becomes a recurring theme through flashbacks, most of which, show Namiki's childhood. The character development goes very deep, and by the end of the movie, as we see that Namiki has committed suicide, the story takes a heart-wrenching turn. Namiki has left behind his family to what he deems a higher purpose, ending the movie with a monologue that he wrote himself as he sat, dying at the bottom of the sea in his kaiten submarine.

The kaiten submarine was a real kamikaze vessel created during World War II. Roughly 300 were created, but only about 100 were used by the end of the war. Nowadays, they serve as a haunting reminder of the lengths people would (and will) go to show their "obligation and gratitude to family and country." Many kaiten operators, if they ran out of fuel during their mission, would self-detonate their warhead, rather than suffering through a slow and painful death at the bottom of the sea. You can read more on this here.