Dynamic Productions is a publishing company owned by Go Nagai founded to help make deal involving the manga made by him and his assistants such as Ken Ishikawa. Its most famous series include Getter Robo, Devilman, and Mazinger.
With the success of the manga Harenchi Gakuen and Abashiri Ikka, Go Nagai and his brothers founded Dynamic Productions to help in making deals involving the series he and others in the company made.
The series Getter Robo was made in collaboration between Go Nagai and his old assistant Ken Ishikawa after going through some old drafts of Mazinger Z. With Nagai credited with the creation of the titular robot, Ishikawa made the Getter Robo manga story while both of them added to the anime in their own specific functions.