en Cuevana 3. The name “Kintaro JD,” who is both smart and powerful, appears. Shark is tricked by JD in a thought experiment and is about to be turned into a shark fin stew. Kintaro JK then dispatches to save Shark, but JD is quite tough and a fierce catfight ensues. Dr. Kintaro JK, unable to stand the situation, makes a suggestion.