- Country: Japan
- Genres: Action, Animation, Short
- Release: 1978-07-22
- Director: Leiji Matsumoto , Rintaro
- Writers: Leiji Matsumoto , Shozo Uehara
- Language: Japanese
- Stars: Makio Inoue , Akira Kamiya , Kenichi Ogata , Hiroshi Ôtake , Akiko Tsuboi , Noriko Tsukase , Chiyoko Kawashima , Noriko Ohara , Hidekatsu Shibata , Joji Yanami
- Runtime: 35 min
- Awards: N/A
- AKA: Space Pirate Captain Harlock: The Mystery of the Arcadia , Mystery of the Arcadia (Japan) , Space Pirate Captian Harlock: Riddle of the Arcadia (Japan) , Uchû kaizoku Captain Harlock: Arcadia-gô no nazo , Space Pirate Captain Harlock: The Mystery of the Arcadia (Japan) , Space Pirate Captain Harlock: The Mystery of the Arcadia (United States of America) , Space Pirate Captain Harlock: The Mystery of the Arcadia (United Kingdom) , Capitan Harlock - Il mistero dell'Arcadia (Italy)
- Plot: Captain Harlock has become a prisoner after the planet Earth was totally destroyed by the "Illmidus" space invader and is taken to their Earth Occupation Force Headquarters where Commander Zeda orders him deported as a dangerous and undesirable character. Harlock is then arrested with a mysterious Japanese named Tochiro after having a fight with some Illmidus military officers and both Harlock and Tochiro are found to be carrying Harlock family documents.
- IMDB:tt0185736
Uchû kaizoku Captain Harlock: Arcadia-gô no nazo Cast · · · ALL
Leiji Matsumoto
Director
Rintaro
Director
Chiyoko Kawashima
Kei Yuki / Mayu Ooyama (voice)
Akira Kamiya
Tadashi Daiba (voice)
Noriko Ohara
Miime / St. Giovanna Headmistress (voice)
Makio Inoue
Captain Harlock (voice)
Hiroshi Ôtake
Yattaran (voice)
Akiko Tsuboi
Witch Aman (voice)
Hidekatsu Shibata
Mitsuru Kiruda / Narrator (voice)
Joji Yanami
Dr. Zero / Prime Minister (voice)
Kenichi Ogata
Chief Engineer Maji (voice)
Noriko Tsukase
Masu Tsunajima (voice)
Kazuhiko Inoue
Banjo Ginga