Shin Kaitei Gunkan
English name: Super Atragon
Genres: Action, Adventure, Fantasy, Sci-Fi
Type: OVA, Episodes: 2
Aired: Dec 21, 1995 to Aug 1, 1996
Studio: Phoenix Entertainment
Source: Novel
Rating: PG-13 - Teens 13 or older
Synopsis:
Moments after an atomic bomb falls over Hiroshima, a secret Japanese submarine sails into battle against its American counterpart, and both are lost to history. Some fifty years later, a special UN task force sent to investigate unusual phenomena in Antarctica is threatened by a mysterious black cylinder.

(Source: ANN)