Yoarashi Okinu (夜嵐 おきぬ, c. 1845[1] – March 28, 1872) is the moniker of Harada Kinu (原田 きぬ), who was a Japanese female poisoner and geisha and lived from the end of the Edo era to the beginning of the Meiji era. Her nickname Yoarashi means night-storm in Japanese.