Warrior Mask was one of the original five of the Black Cross Army and was instrumental in the Black Cross Führer's attempt to take destroy all of the EAGLE bases in Japan. Warrior Mask attacked the Touhoku branch, killing everyone with Akira Shinmei the only survivor of the attack. Although this was a huge victory for the BCA, this catastrophe led to the lone survivors becoming the Gorenger, a special squadron dedicated to the destruction of the Black Cross Army.

Later, Warrior Mask later stole a new weapon that could transform objects into sand. His ultimate plot was to take this weapon into space and fire it changing Earth into a lifeless planet. In order to build a satellite that could utilize this weapon, Warrior Mask took Doctor Kudo, the lead scientist on the project, hostage. In order to force Kudo to do their bidding, Warrior Mask had his minions kidnap the doctor's son, Koichi Kudo. During their battles against Warrior Mask, Akira Shinmei was driven to avenge the death of his colleagues at the Touhoku branch, but was reminded by Tsuyoshi Kaijo that their primary goal was rescuing Kudo and his son.