Kawashima Yoshiko (born Aisin Gioro Xianyu, 1907-1948) was the daughter of a Manchu prince. After the fall of the Manchu dynasty, she was raised by a Japanese friend of her father to restore the Manchus to their former glory. Her dedication to this cause, including supporting the puppet state established by the Japanese in 1932, ultimately got her executed for treason after Japan's defeat. The truth of Yoshiko's life is still a source of contention between China and Japan. This biography presents the richest and most accurate portrait to date of the controversial princess spy.