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The word "defeat" doesn't exist in my dictionary!
~ Great Professor Bias.
Great Professor Bias: What is this?
Gash: Fireworks, Fireworks to celebrate the conquer of the Earth.
Great Professor Bias: I see. It's wonderful!... Can you see it? Hear them!
Gash: Yes, all the humans glorifying you, Great Bias. VIVA BIAS!
~ The now elderly Bias's final moments before dying in Zuno Base, convinced of his victory by Guardnoid Gash.
What are you waiting for?! That was an order to all of you.
~ Bias' rare villainous breakdown.

Great Professor Bias is the leader of Armed Brain Army Volt and the main antagonist of Choujuu Sentai Liveman.

He is a super-intelligent scientist with knowledge in seemingly all fields. He founded Volt to achieve his ambition of ruling the world and have humanity worship him. His followers hold him as a god, and he pretends to care about them, though his fact his real goal and the true reason he founded Volt is to complete the Giga Brain Wave, which would require the sacrifice of his followers, allowing him to become immortal and rule over humanity as a god.

He was portrayed by Jouji Nakata, who is known for his voice acting role as Kazuya Mishima in Tekken series and Kirei Kotomine in Fate series. His child form was portrayed by Kentaro Ishizeki.


Though appearing to be in his thirties, Bias is in fact a man generations old, having managed to stay alive by absorbing a mind controlling thought pattern energy called the "Giga Brain Wave". In order to achieve complete immortality though, Bias would need to absorb the minds of 12 people with IQs of 1,000. Thus, Bias educated his eleven followers until they achieved the ideal IQ and extracted their brains to use for the Giga Brain Wave, needing only one more brain to complete the procedure that would render him totally immortal.

Founding the Armed Brain Army Volt, Bias recruited three Academia students into his organization, Kenji Tsugikata, Rui Senda, and Gou Omura, viewing the former two as ideal candidates to complete the Giga Brain Wave while letting in the latter out of pity. To spur on his students' creativity, Bias constructed two robots, Guildos and Butchy, and programmed them to believe they were aliens before arranging for them to land on Earth and be recruited into Volt.

Bias later selects Kemp to complete the Brain Wave after he reaches the IQ of 1,000. However, Kemp rallies the spirits of Bias' previous victims to take revenge and stop Bias, causing him to age back to his true self. As the Zuno Base explodes around him. Before he dies, he is told by Gash that Volt succeeded in taking over the Earth, and the explosions are from fireworks to celebrate his victory.



  • Among a franchise full of outright villains, Bias is one of the few particular Sentai villains whose don't think themselves as evil, similar to Brajira of the Messiah.
  • The villain in the 30th episode of Kaizoku Sentai Gokaiger, Great Scientist Zaien, pays homage to Bias, due to appearing in an episode tribute to Liveman and is also voiced by Joji Nakata.
  • Bias is Joji Nakata's final live-action role in Sentai franchise so far, since he later joins the franchise as a voice actor of later Sentai villains like the aforementioned Great Scientist Zaien from Kaizoku Sentai Gokaiger (of which is the franchise's 35th anniversary series), Azald from Doubutsu Sentai Zyuohger (of which is the franchise's 40th anniversary series) and Tankjo in Kishiryu Sentai Ryusoulger.


           Logo-liveman.png Villains

Armed Brain Army Volt
Great Professor Bias | Guardnoid Gash | Doctor Kemp | Doctor Mazenda | Doctor Obular | Doctor Ashura | Guildos | Butchy | Jimmers
Brain Beasts: Disconnect Brain | Virus Brain | Transmission Brain | Engine Brain | Time Brain | Anger Brain | Tank Brain | Maze Brain | Baboon Brain | Test Brain | Poison Gas Brain | Elec Brain | Fire Brain | Plasma Brain | Pierrot Brain | Twin Brain | Study Brain | Regeneration Brain | Obular Brain | Guitar Brain | Sword Brain | Pig Brain | Spirit Brain | Light Brain | Earthquake Brain | Vega Brain | Gore Brain | Robo Brain | Gal Brain | Guild Brain | Armor Brain | Shark Brain | Wolf Brain | Meteor Brain | Space Brain | Invisible Brain | Bomber Brain | Guildo Brain | Reckless Brain | Hacker Brain | Battle Brain | Nightmare Brain | Terror Beast Brain | Electron Brain

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