| Director: | Maurice Labro |
| Story: | Ernie Clark |
| Cinematography: | Didier Tarot |
| Editing: | Marcelle Lehérissey |
| Music: | Antoine Duhamel |
| Studio: | Les Films Corona |
| Country: | France, Germany, Italy |
| Language: | French |
Casse-tête chinois pour le judoka (Italian title: Ore violente, German title: Die sieben Masken des Judoka)[1] is a 1967 French-Italian-German adventure and spy film directed by Maurice Labro.[2] [3]
Marc St. Clair wins a medal at a kendo tournament in Tokyo, which he gives to his American friend Clyde for good luck. As an airplane pilot, Clyde accompanies a C.I.A. agent, Finn, on a secret mission to fly over China to investigate a supersonic bomber. In Clyde's absence, Marc begins an affair with Jennifer, his girlfriend, before learning of the plane's disappearance. Remorseful, Marc leaves for Hong Kong to find Clyde where he confronts the powerful Black Dragons.