The Demon Seed are a team of six Akuma Chojin.
It is during the Demon Seed Arc of Kinnikuman Nisei that they first appear. They kidnap Meat Alexandria, by breaking his body into six parts, and challenge the New Generation to defeat them, in order to win back the body parts and save him from death (and resurrecting General Terror).  There follows a series of matches with former Akugyo Chojin, who are the only ones able to access the six palasts where the battles are to take place, and also Kinniku Mantaro.
The matches are as follows:
- Mantaro Kinniku vs. The Constellation 
- Hanzo vs. Gepparland 
- Ilioukhine vs. Meltdown 
- Barrierfreeman vs. The Tattooman 
- Mars & Kevin Mask vs. Asuraman & Voltman 
- Mantaro Kinniku & Kevin Mask vs. Asuraman and Voltman