Murder of Yasuko Watanabe

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Yasuko Watanabe (渡邉 泰子, Watanabe Yasuko, June 7, 1957 – March 9, 1997) was a 39-year-old unmarried Japanese woman, a senior economic researcher at the Tokyo Electric Power Company (TEPCO) moonlighting as a prostitute on the streets by night. She fell victim to murder by strangulation^[1] and rape^[2] by an unknown assailant in Harajuku, Shibuya on March 9, 1997. After being reported missing by her mother with whom she lived, her body was discovered on March 19, 1997^[1] in a vacant apartment in the Maruyamachō neighborhood of Shibuya, Tokyo^[3] where she engaged in prostitution.

During the investigation it was discovered that she had kept a detailed journal of her many clients, including dates, times and fees.^[4]