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Kenichi Ito, known as the "world's fastest man on four legs", trains before his challenge to break his Guinness World Record in Tokyo, Japan. The 31-year-old, who developed his skills over 10 years based on the running style of the African Patas monkey, set a new Guinness World Record, clocking in 16:87 seconds for a 100-meter run and breaking his previous record of 17:23 seconds, according to media reports.