Black Sun (1964 film)
Black Sun , Kuroi taiy? is a 1964 Nikkatsu film directed by Koreyoshi Kurahara based on a story by Tensei Kono and starring Tamio Kawaji and Chico Roland. The film had many of the same cast, crew, and characters as Kuraharas earlier film The Warped Ones.
Eventually, the soldier asks Mei to take him to the sea, for unknown reasons, and on their way there, they form a bond and become close friends. However, eventually they encounter MPs. In a moment of despair, the soldier sings Six Bits Blues as its original blues dirge, affecting Mei. Mei and Gill find their way to the top of a building, overlooking the sea, where Gill ties himself to a balloon. He asks Akira to cut the rope, hoping to float up in the air and from there, to see his mother one more time. Mei reluctantly fulfills his request and they all watch the soldier, buoyed on his airborne balloon, as he approaches the sea.
Source: Wikipedia