- Country: Japan
- Genres: Crime
- Release: 1970-06-04
- Director: Sadao Nakajima
- Writers: Takeo Kaneko , Sadao Nakajima
- Language: Japanese
- Stars: Bunta Sugawara , Chiezō Kataoka , Tetsurō Tamba , Tomisaburō Wakayama , Asao Koike , Nobuo Kaneko , Hōsei Komatsu , Yukie Kagawa , Masumi Tachibana , Rokkō Toura
- Runtime: 100 min
- Awards: N/A
- AKA: Sengo hiwa, hoseki ryakudatsu , The Underground Syndicate , Postwar Secrets (United States of America) , Secret Story - Plundering the Jewel , 戦後秘話 宝石略奪 (Japan) , Postwar Secrets (United Kingdom) , Postwar Secrets
- Plot: N/A
- IMDB:tt0204620
The Underground Syndicate Cast · · · ALL
Sadao Nakajima
Director
Bunta Sugawara
Shin'ichi Yamada
Chiezō Kataoka
Yaroku Okamura
Tetsurō Tamba
Kuroki
Tomisaburō Wakayama
Asao Koike
Nobuo Kaneko
Hōsei Komatsu
Masumi Tachibana