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Akira Nishiguchi(西口 彰,Nishiguchi Akira?, December 14, 1925 – December 11, 1970) was a Japaneseserial killer and fraudster. He is most known for being able to confuse Japanese police into believing that he was only connected to fraud rather than the murders. While engaging in confidence scams, he murdered two people, was put on the most wanted list, and killed three others while escaping. The police also regretted that they didn't find Nishiguchi, who was found by an 11-year-old girl. A prosecutor called him "the Black Gold Medalist in history".Ryuzo Saki published a book about Nishiguchi, which became the basis for the film Vengeance Is Mine. His crimes were the direct catalyst for the creation of the Japanese "Metropolitan Designated Case" system