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- Country: Japan
- Genres: Action, Adventure, Sci-Fi
- Release: 1967-10-02
- Director: N/A
- Writers: N/A
- Language: Japanese
- Stars: Mitsunori Nomura , Akira Yamaguchi , Yoshinori Nomura , Kazuyuki Senba , Kazuko Takamori , Katsumi Itô , Koinosuke Ogami , Takamitsu Watanabe , Franz Gruber , Junkichi Kamada
- Runtime: 30 min
- Awards: N/A
- AKA: Kaijû Ôji , Kaijû Ôji (Japan) , Monster Prince , El príncipe dinosaurio (Argentina)
- Plot: A little boy named Takeru, separated from his family after a plane crash, uses his giant pet dinosaur Nessie to help the Japanese military fight evil monsters.
- IMDB:tt0185090
Kaijû Ôji Cast
Mitsunori Nomura
Takeru Ibuki (Monster Prince)
Akira Yamaguchi
Takao Nishizumi
Yoshinori Nomura
Mitsuru Ibuki
Kazuyuki Senba
Seiichi Ibuki
Kazuko Takamori
Asako Ibuki
Katsumi Itô
Kunio Ejima","Capt. Nakamaru
Koinosuke Ogami
Army Cmdr. Nakasone
Takamitsu Watanabe
Kumaku Kuse
Franz Gruber
Prof. Oliver
Junkichi Kamada
Sgt. Hashiba