Going back to the drawing board, Ishimori decided to design something radical, and came up with several different, and very disparate designs, and let his little son, pick the final design he would bring into Toei. He called it, "Hopper King." Hirayama loved it, while others thought that it was too grotesque for a superhero, but it was Hirayama that thought it was a stroke of genius and pushed it through, becoming "Hopper King, the Masked Rider." When the series started shooting on February 7, 1971, the series was shorted to KAMEN RIDER.