The plot of Marine Express can be described in two parts. The first part focuses on the people boarding the train and the problems they encounter on it. The second part takes place after the train has stopped at its half-way point, an island that used to be home to an ancient civilization millennia ago and has its fair share of secrets.
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| Directing | Satoshi Dezaki | Director |
| Writing | Osamu Tezuka | Story |
| Production | Akira Yoshikawa | Producer |
| Production | Tadahiko Tsuzuki | Producer |
| Production | Michitoshi Shimakata | Executive Producer |
| Sound | Yuji Ohno | Original Music Composer |
| Art | Mitsunari Makino | Art Direction |
| Visual Effects | Shigetaka Kiyoyama | Animation Director |
| Visual Effects | Osamu Tezuka | Character Designer |
| Editing | Hiroshi Shinohara | Color Timer |
| Art | Nao Sakaguchi | Settings |
| Editing | Kazuo Inoue | Editor |
