Kurokawa Yoshimasa, Daidoji Masashi, Masunaga Toshiaki, and Arai Mariko, all members of the East Asian Anti-Japanese Armed Front " Scorpion, " were incarcerated for instigating the bombing of the Marunouchi offices of Mitsubishi Heavy Industries. This film was conceived of and directed by Kurokawa whilst in prison. During the making of this film, he and his fellow members were under sentences of death or life imprisonment. As testimony to Kurokawa's idea that " the emperor system is not only an incarnation of the patriarchal principle but also the embodiment of the female principle, " the film aims " to critically examine the essence of the Japanese maternal image. "