Female Kenshin Uesugi

Female Uesugi Kenshin as featured in the Nobunaga's Ambition video-game

Since Uesugi Kenshin was said to have had fair skin and little interest in women, the theory that Kenshin was actually a woman has been floating around. It was popularized by the novelist, Tomeo Yagiri, who was also famous for claiming that Oda Nobunaga was not assassinated at the Battle of Honnō-ji by Akechi Mitsuhide.