Imagawa Yoshimoto
The anime series "Sengoku Collection" features a female interpretation of Kotarō, being a servant to the female version of Imagawa Yoshimoto. In the manga and anime series "Laughing Under the Clouds", Fuma Kotaro is a couple of twins who both rule over a falling Fuma clan. In the manga series "Yaiba", he is a revenant brought back to life by Onimaru.