After a passenger ship sinks in 1954, Go Akutsu devises a life-saving project in the form of a tunnel under the Tsugaru Strait. While working on this project Akutsu becomes involved with Tae Makimura leading to his estrangement from his wife.
Is The Longest Tunnel on Netflix? Unfortunately the movie The Longest Tunnel is not yet available on Netflix.
| Production | Tomoyuki Tanaka | Producer |
| Production | Michio Morioka | Producer |
| Camera | Daisaku Kimura | Director of Photography |
| Editing | Michiko Ikeda | Editor |
| Writing | Shirō Moritani | Screenplay |
| Production | Shirō Moritani | Producer |
| Art | Yoshirō Muraki | Set Designer |
| Production | Juichi Tanaka | Producer |
| Directing | Shirō Moritani | Director |
| Writing | Toshiro Ide | Screenplay |
| Sound | Kôsetsu Minami | Music |
| Writing | Takashi Iwakawa | Original Story |