Princess Yoshiko (28 October 1804 – 27 January 1893) was the younger sister of Prince Tsunahito of the Arisugawa-no-miya cadet branch of the Imperial House of Japan. Yoshiko was married to Tokugawa Nariaki, and was mother to the 10th Lord Yoshiatsu, and the 15th and final Tokugawa shogun, Tokugawa Yoshinobu.