Mazinkaiser is a Japanese anime OVA produced by Brain's Base and Dynamic Productions, based on the Mazinkaiser design that debuted in Super Robot Wars games and the original Mazinger Z manga by Go Nagai. The OVA follows Kouji Kabuto, Tetsuya Tsurugi and the rest of the "Mazinger Team" as they fight against Dr. Hell's Mechanical Beasts while Kouji stumbles upon a forgotten laboratory where he finds Mazinkaiser, the most powerful robot ever built. The series chronicles Kouji's experience with the machine as he copes with Kaiser's power while defeating Dr. Hell's forces.