Sada Abe (阿部 定, Abe Sada; born May 28, 1905; disappeared 1970) was a Japanese geisha and prostitute who murdered her lover, Kichizō Ishida (石田 吉蔵), via strangulation on May 18, 1936, before cutting off his penis and testicles and carrying them around with her in her kimono. The story became a national sensation in Japan, acquiring mythic overtones; it has also been interpreted by artists, philosophers, novelists and filmmakers. Abe was released after serving five years in prison and went on to write an autobiography.
Source: “Sada Abe”, English Wikipedia (CC BY-SA 4.0), excerpt