Best Buy: G.I. Samurai: Sengoku Jieitai [DVD] [1981]
Cult films and the people who make them: GI Samurai
G.I. Samurai - Internet Movie Firearms Database - Guns in Movies, TV and Video Games
G.I. Samurai (1979) - Filmaffinity
Amazon.com: Time Slip (aka GI Samurai) Two-Disc Special Edition [DVD] : Shinichi Sonny Chiba, Isao Natsuki and Tsunehiko Watase, Mitsumasa Saito and Kosei Saito: Movies & TV