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Yakuza Weapon is a 2011 Japanese film directed and written by Tak Sakaguchi and Yūdai Yamaguchi. Based on the manga by Ken Ishikawa, the film is about Shozo Iwaki who works as a mercenary in South America. Iwaki is informed of the death of his gang boss dad and discovers his former Yakuza henchman is involved in a double-cross. Yakuza Weapon was premiered at the 2011 Yubari International Fantastic Film Festival and opened theatrically in Japan on July 23, 2011.