Masayoshi Hisada (born 1967) is a Japanese editor and nonfiction writer. Formerly the editor-in-chief of "Jitsuwa Knuckles," he has spent decades investigating Japan's criminal underworld, covering organized crime, semi-organized gangs, fraud, and other forms of contemporary crime through publications including "Dark Side JAPAN" and the *Asahi Shimbun*'s weekly magazine "Shūkan Asahi." His best-known recent book, "Special Fraud and Serial Robberies: The Changing Structure and Methods of Modern Crime," traces the evolution of special fraud schemes and fluid criminal groups, illustrating how organized crime in Japan has transformed in the twenty-first century.
