Sakomizu, a scientist employed by the Kuryu Group, developed the experimental Vajranoid cyborg for a United Nations global disarmament initiative. He and his team boarded the aircraft carrier Alexandria, deployed to resolve a border dispute involving Karain. The Vajranoid could fuse with machinery and utilize psychic energy. During a test flight, it detected Elaine, a psychic girl rescued by a UN scout plane, and reacted violently, forcing the plane into a crash landing. Blamed for the incident, Sakomizu was confined to quarters and ordered to seal the Vajranoid.

While confined, Sakomizu discovered the Vajranoid had secretly reactivated, killed three crew members, and battled an unknown enemy later identified as Genocyber. Finding Genocyber's severed arm, which the Vajranoid had attempted to assimilate before its destruction, Sakomizu and his team used it to rebuild the cyborg. This granted the revived Vajranoid enhanced power to fuse with the Alexandria's engines. It assimilated the entire ship and crew into a single consciousness, with Sakomizu acting as its spokesperson. He claimed the assimilated crew lived within the collective and announced the ship's new mission to destroy Karain.

Confronted by Dr. Myra and Elaine on the flight deck, Sakomizu invited them to join the Vajranoid collective. The mentally unstable Myra attacked him with a fire axe, embedding it in his head. This caused his brain to emerge from his mouth, attached to mutated cartilage. Elaine then emitted a psychic blast that disintegrated Sakomizu's body.