Undersea Super Train: Marine Express is a special anime that premiered in summer 1979, produced by Tezuka Productions.

About the production: there is 1 episode of about 91 minutes and its current status is "finished".

Its main genres are action, adventure, comedy, drama and sci-fi, with themes such as Trains, Crossover, Meta and Robots.

On AniList, Undersea Super Train: Marine Express has an average score of 59%, an average score, and appears on 1,031 users' lists.

The year is 2002, and the Marine Express, the first underwater train between America and Japan, is ready for its maiden voyage. The chief engineer suspects that the train's test run will be used for illicit purposes and hires private detective Ban Shunsaku. He arrives to his client's mansion only to find that he has just been murdered. Armed with just a glimpse of the murderer's face, Shunsaku boards the Marine Express to get to the bottom of this mystery. This job, however, is much more than what he bargained for, as the train holds secrets beyond anyone's imagination. (Source: Anime News Network)

Official synopsis from AniList.