An MSDF submarine collides with a U.S. nuclear submarine, crushing all 76 people on board, including its CO, Shiro Kaieda. However, the crew survives. The accident is a cover story to get the MSDF submarine's crew on board the Seabat, a nuclear submarine secretly built by the Japanese and U.S. governments. However, Kaieda loads the Seabat with nuclear missiles and suddenly mutinies and flees.
| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | Yamanami Crushes | 2024-02-09 | 56 min |
| Season 1 | Episode 2 | Seabat Surfaces | 2024-02-09 | 45 min |
| Season 1 | Episode 3 | Kaieda VS Fukamachi | 2024-02-09 | 41 min |
| Season 1 | Episode 4 | Combat Begins | 2024-02-09 | 45 min |
| Season 1 | Episode 5 | Japan-U.S. Summit Meeting | 2024-02-09 | 40 min |
| Season 1 | Episode 6 | Seabat Enters Tokyo Bay | 2024-02-09 | 47 min |
| Season 1 | Episode 7 | Yamato vs. Japan, Alliance Negotiations | 2024-02-16 | 44 min |
| Season 1 | Episode 8 | Tatsunami Sinks | 2024-02-16 | 57 min |
| Writing | Kaiji Kawaguchi | Original Concept |
| Production | Takao Osawa | Producer |
| Sound | Ado | Theme Song Performance |
